68904661 has 12 divisors (see below), whose sum is σ = 81378336. Its totient is φ = 57150360.

The previous prime is 68904653. The next prime is 68904721. The reversal of 68904661 is 16640986.

It is not a de Polignac number, because 68904661 - 2³ = 68904653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68904061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1606 + ... + 11848.

It is an arithmetic number, because the mean of its divisors is an integer number (6781528).

Almost surely, 2^68904661 is an apocalyptic number.

It is an amenable number.

68904661 is a deficient number, since it is larger than the sum of its proper divisors (12473675).

68904661 is a wasteful number, since it uses less digits than its factorization.

68904661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10312 (or 10281 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 68904661 is about 8300.8831457864. The cubic root of 68904661 is about 409.9675980739.

The spelling of 68904661 in words is "sixty-eight million, nine hundred four thousand, six hundred sixty-one".