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66790743 = 3131169951
BaseRepresentation
bin1111111011001…
…0010101010111
311122200022200020
43332302111113
5114044300433
610343320223
71440466125
oct376622527
9148608606
1066790743
1134779968
121a450073
1310ab6b66
148c28915
155ce4cb3
hex3fb2557

66790743 has 8 divisors (see below), whose sum is σ = 89734656. Its totient is φ = 44187000.

The previous prime is 66790727. The next prime is 66790747. The reversal of 66790743 is 34709766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66790743 - 24 = 66790727 is a prime.

It is a super-2 number, since 2×667907432 = 8922006700984098, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66790695 and 66790704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66790747) 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 7 ways as a sum of consecutive naturals, for example, 84583 + ... + 85368.

It is an arithmetic number, because the mean of its divisors is an integer number (11216832).

Almost surely, 266790743 is an apocalyptic number.

66790743 is a deficient number, since it is larger than the sum of its proper divisors (22943913).

66790743 is a wasteful number, since it uses less digits than its factorization.

66790743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170085.

The product of its (nonzero) digits is 190512, while the sum is 42.

The square root of 66790743 is about 8172.5603699208. The cubic root of 66790743 is about 405.7315295816.

The spelling of 66790743 in words is "sixty-six million, seven hundred ninety thousand, seven hundred forty-three".

Divisors: 1 3 131 393 169951 509853 22263581 66790743