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66763369 = 173927257
BaseRepresentation
bin1111111010101…
…1101001101001
311122121221010101
43332223221221
5114042411434
610342545401
71440323251
oct376535151
9148557111
1066763369
1134760342
121a438261
1310aa756a
148c1c961
155cdbb14
hex3faba69

66763369 has 4 divisors (see below), whose sum is σ = 70690644. Its totient is φ = 62836096.

The previous prime is 66763357. The next prime is 66763381. The reversal of 66763369 is 96336766.

66763369 = T6670 + T6671 + T6672.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (66763357) and next prime (66763381).

It can be written as a sum of positive squares in 2 ways, for example, as 61027344 + 5736025 = 7812^2 + 2395^2 .

It is a cyclic number.

It is not a de Polignac number, because 66763369 - 25 = 66763337 is a prime.

It is a super-2 number, since 2×667633692 = 8914694880460322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66763309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1963612 + ... + 1963645.

It is an arithmetic number, because the mean of its divisors is an integer number (17672661).

Almost surely, 266763369 is an apocalyptic number.

66763369 is the 6672-nd centered triangular number.

It is an amenable number.

66763369 is a deficient number, since it is larger than the sum of its proper divisors (3927275).

66763369 is a wasteful number, since it uses less digits than its factorization.

66763369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3927274.

The product of its digits is 734832, while the sum is 46.

The square root of 66763369 is about 8170.8854477345. The cubic root of 66763369 is about 405.6760926949.

The spelling of 66763369 in words is "sixty-six million, seven hundred sixty-three thousand, three hundred sixty-nine".

Divisors: 1 17 3927257 66763369