68720684 has 6 divisors (see below), whose sum is σ = 120261204. Its totient is φ = 34360340.

The previous prime is 68720683. The next prime is 68720689. The reversal of 68720684 is 48602786.

It is not an unprimeable number, because it can be changed into a prime (68720683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8590082 + ... + 8590089.

It is an arithmetic number, because the mean of its divisors is an integer number (20043534).

Almost surely, 2^68720684 is an apocalyptic number.

It is an amenable number.

68720684 is a deficient number, since it is larger than the sum of its proper divisors (51540520).

68720684 is a wasteful number, since it uses less digits than its factorization.

68720684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17180175 (or 17180173 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 68720684 is about 8289.7939660766. The cubic root of 68720684 is about 409.6023986040.

The spelling of 68720684 in words is "sixty-eight million, seven hundred twenty thousand, six hundred eighty-four".