660625627164 has 24 divisors (see below), whose sum is σ = 1541973529488. Its totient is φ = 220135152000.

The previous prime is 660625627163. The next prime is 660625627171. The reversal of 660625627164 is 461726526066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660625627163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9136287 + ... + 9208310.

It is an arithmetic number, because the mean of its divisors is an integer number (64248897062).

Almost surely, 2^660625627164 is an apocalyptic number.

It is an amenable number.

660625627164 is an abundant number, since it is smaller than the sum of its proper divisors (881347902324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660625627164 is a wasteful number, since it uses less digits than its factorization.

660625627164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18347605 (or 18347603 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 51.

The spelling of 660625627164 in words is "six hundred sixty billion, six hundred twenty-five million, six hundred twenty-seven thousand, one hundred sixty-four".