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68266069 = 194383557
BaseRepresentation
bin1000001000110…
…10100001010101
311202110021102221
410010122201111
5114434003234
610435102341
71456152304
oct404324125
9152407387
1068266069
1135597343
121aa419b1
13111b2531
1490d043b
155ed6eb4
hex411a855

68266069 has 8 divisors (see below), whose sum is σ = 73531040. Its totient is φ = 63168336.

The previous prime is 68266063. The next prime is 68266091. The reversal of 68266069 is 96066286.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 68266069 - 27 = 68265941 is a prime.

It is a super-2 number, since 2×682660692 = 9320512353425522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68266063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40962 + ... + 42595.

It is an arithmetic number, because the mean of its divisors is an integer number (9191380).

Almost surely, 268266069 is an apocalyptic number.

It is an amenable number.

68266069 is a deficient number, since it is larger than the sum of its proper divisors (5264971).

68266069 is a wasteful number, since it uses less digits than its factorization.

68266069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83619.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 68266069 is about 8262.3283038136. The cubic root of 68266069 is about 408.6971712377.

The spelling of 68266069 in words is "sixty-eight million, two hundred sixty-six thousand, sixty-nine".

Divisors: 1 19 43 817 83557 1587583 3592951 68266069