8725684664 has 32 divisors (see below), whose sum is σ = 16588150320. Its totient is φ = 4302498816.

The previous prime is 8725684663. The next prime is 8725684717. The reversal of 8725684664 is 4664865278.

It is a super-2 number, since 2×8725684664² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8725684661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199742 + ... + 239474.

Almost surely, 2^8725684664 is an apocalyptic number.

It is an amenable number.

8725684664 is a deficient number, since it is larger than the sum of its proper divisors (7862465656).

8725684664 is a wasteful number, since it uses less digits than its factorization.

8725684664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40119 (or 40115 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 56.

The square root of 8725684664 is about 93411.3733118189. The cubic root of 8725684664 is about 2058.7321088535.

The spelling of 8725684664 in words is "eight billion, seven hundred twenty-five million, six hundred eighty-four thousand, six hundred sixty-four".