68887664 has 10 divisors (see below), whose sum is σ = 133469880. Its totient is φ = 34443824.

The previous prime is 68887661. The next prime is 68887699. The reversal of 68887664 is 46678886.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68887661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2152724 + ... + 2152755.

It is an arithmetic number, because the mean of its divisors is an integer number (13346988).

Almost surely, 2^68887664 is an apocalyptic number.

It is an amenable number.

68887664 is a deficient number, since it is larger than the sum of its proper divisors (64582216).

68887664 is a wasteful number, since it uses less digits than its factorization.

68887664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4305487 (or 4305481 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 53.

The square root of 68887664 is about 8299.8592759155. The cubic root of 68887664 is about 409.9338858296.

The spelling of 68887664 in words is "sixty-eight million, eight hundred eighty-seven thousand, six hundred sixty-four".