66791925164 has 12 divisors (see below), whose sum is σ = 116895314088. Its totient is φ = 33393264000.

The previous prime is 66791925163. The next prime is 66791925169. The reversal of 66791925164 is 46152919766.

It is a super-2 number, since 2×66791925164² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66791925163) 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, 618437 + ... + 718364.

It is an arithmetic number, because the mean of its divisors is an integer number (9741276174).

Almost surely, 2^66791925164 is an apocalyptic number.

It is an amenable number.

66791925164 is a deficient number, since it is larger than the sum of its proper divisors (50103388924).

66791925164 is a wasteful number, since it uses less digits than its factorization.

66791925164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349296 (or 1349294 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 56.

The spelling of 66791925164 in words is "sixty-six billion, seven hundred ninety-one million, nine hundred twenty-five thousand, one hundred sixty-four".