64680716 has 24 divisors (see below), whose sum is σ = 121546656. Its totient is φ = 30007040.

The previous prime is 64680713. The next prime is 64680743. The reversal of 64680716 is 61708646.

It is a self number, because there is not a number n which added to its sum of digits gives 64680716.

It is not an unprimeable number, because it can be changed into a prime (64680713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1871 + ... + 11526.

It is an arithmetic number, because the mean of its divisors is an integer number (5064444).

Almost surely, 2^64680716 is an apocalyptic number.

It is an amenable number.

64680716 is a deficient number, since it is larger than the sum of its proper divisors (56865940).

64680716 is a wasteful number, since it uses less digits than its factorization.

64680716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13489 (or 13487 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 64680716 is about 8042.4322191735. The cubic root of 64680716 is about 401.4131599017.

The spelling of 64680716 in words is "sixty-four million, six hundred eighty thousand, seven hundred sixteen".