680705264 has 10 divisors (see below), whose sum is σ = 1318866480. Its totient is φ = 340352624.

The previous prime is 680705261. The next prime is 680705297. The reversal of 680705264 is 462507086.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680705261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21272024 + ... + 21272055.

It is an arithmetic number, because the mean of its divisors is an integer number (131886648).

Almost surely, 2^680705264 is an apocalyptic number.

It is an amenable number.

680705264 is a deficient number, since it is larger than the sum of its proper divisors (638161216).

680705264 is a wasteful number, since it uses less digits than its factorization.

680705264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42544087 (or 42544081 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 680705264 is about 26090.3289362170. The cubic root of 680705264 is about 879.6698417115.

The spelling of 680705264 in words is "six hundred eighty million, seven hundred five thousand, two hundred sixty-four".