68686761 has 32 divisors (see below), whose sum is σ = 111323520. Its totient is φ = 37094400.

The previous prime is 68686753. The next prime is 68686801. The reversal of 68686761 is 16768686.

It is not a de Polignac number, because 68686761 - 2³ = 68686753 is a prime.

It is a super-2 number, since 2×68686761² = 9435742273342242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68686761.

It is not an unprimeable number, because it can be changed into a prime (68686721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9681 + ... + 15201.

It is an arithmetic number, because the mean of its divisors is an integer number (3478860).

Almost surely, 2^68686761 is an apocalyptic number.

It is an amenable number.

68686761 is a deficient number, since it is larger than the sum of its proper divisors (42636759).

68686761 is a wasteful number, since it uses less digits than its factorization.

68686761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5577.

The product of its digits is 580608, while the sum is 48.

The square root of 68686761 is about 8287.7476433588. The cubic root of 68686761 is about 409.5349893548.

The spelling of 68686761 in words is "sixty-eight million, six hundred eighty-six thousand, seven hundred sixty-one".