8723920664 has 16 divisors (see below), whose sum is σ = 16374748320. Its totient is φ = 4357321120.

The previous prime is 8723920637. The next prime is 8723920669. The reversal of 8723920664 is 4660293278.

It is a super-2 number, since 2×8723920664² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8723920669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 571904 + ... + 586959.

It is an arithmetic number, because the mean of its divisors is an integer number (1023421770).

Almost surely, 2^8723920664 is an apocalyptic number.

It is an amenable number.

8723920664 is a deficient number, since it is larger than the sum of its proper divisors (7650827656).

8723920664 is a wasteful number, since it uses less digits than its factorization.

8723920664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159810 (or 1159806 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 8723920664 is about 93401.9307295090. The cubic root of 8723920664 is about 2058.5933671833.

The spelling of 8723920664 in words is "eight billion, seven hundred twenty-three million, nine hundred twenty thousand, six hundred sixty-four".