68467664 has 10 divisors (see below), whose sum is σ = 132656130. Its totient is φ = 34233824.

The previous prime is 68467639. The next prime is 68467669. The reversal of 68467664 is 46676486.

It can be written as a sum of positive squares in only one way, i.e., 67240000 + 1227664 = 8200^2 + 1108^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68467669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2139599 + ... + 2139630.

It is an arithmetic number, because the mean of its divisors is an integer number (13265613).

Almost surely, 2^68467664 is an apocalyptic number.

It is an amenable number.

68467664 is a deficient number, since it is larger than the sum of its proper divisors (64188466).

68467664 is a wasteful number, since it uses less digits than its factorization.

68467664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4279237 (or 4279231 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 47.

The square root of 68467664 is about 8274.5189588278. The cubic root of 68467664 is about 409.0990806957.

The spelling of 68467664 in words is "sixty-eight million, four hundred sixty-seven thousand, six hundred sixty-four".