68469664 has 12 divisors (see below), whose sum is σ = 134799714. Its totient is φ = 34234816.

The previous prime is 68469649. The next prime is 68469671. The reversal of 68469664 is 46696486.

It can be written as a sum of positive squares in only one way, i.e., 68227600 + 242064 = 8260^2 + 492^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069807 + ... + 1069870.

Almost surely, 2^68469664 is an apocalyptic number.

It is an amenable number.

68469664 is a deficient number, since it is larger than the sum of its proper divisors (66330050).

68469664 is a wasteful number, since it uses less digits than its factorization.

68469664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139687 (or 2139679 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 49.

The square root of 68469664 is about 8274.6398108921. The cubic root of 68469664 is about 409.1030640369.

The spelling of 68469664 in words is "sixty-eight million, four hundred sixty-nine thousand, six hundred sixty-four".