68616657 has 24 divisors (see below), whose sum is σ = 106884960. Its totient is φ = 42275520.

The previous prime is 68616589. The next prime is 68616679. The reversal of 68616657 is 75661686.

It is not a de Polignac number, because 68616657 - 2⁷ = 68616529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68616157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2118 + ... + 11904.

It is an arithmetic number, because the mean of its divisors is an integer number (4453540).

Almost surely, 2^68616657 is an apocalyptic number.

It is an amenable number.

68616657 is a deficient number, since it is larger than the sum of its proper divisors (38268303).

68616657 is a wasteful number, since it uses less digits than its factorization.

68616657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9853 (or 9850 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 68616657 is about 8283.5171877651. The cubic root of 68616657 is about 409.3956135688.

The spelling of 68616657 in words is "sixty-eight million, six hundred sixteen thousand, six hundred fifty-seven".