68686672 has 20 divisors (see below), whose sum is σ = 140085280. Its totient is φ = 32535648.

The previous prime is 68686637. The next prime is 68686697. The reversal of 68686672 is 27668686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112668 + ... + 113275.

It is an arithmetic number, because the mean of its divisors is an integer number (7004264).

Almost surely, 2^68686672 is an apocalyptic number.

It is an amenable number.

68686672 is an abundant number, since it is smaller than the sum of its proper divisors (71398608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68686672 is a wasteful number, since it uses less digits than its factorization.

68686672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225970 (or 225964 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 49.

The square root of 68686672 is about 8287.7422739851. The cubic root of 68686672 is about 409.5348124715.

The spelling of 68686672 in words is "sixty-eight million, six hundred eighty-six thousand, six hundred seventy-two".