66560700557944 has 16 divisors (see below), whose sum is σ = 125753995330920. Its totient is φ = 33026301803040.

The previous prime is 66560700557941. The next prime is 66560700557951. The reversal of 66560700557944 is 44975500706566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66560700557941) 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, 31756058379 + ... + 31756060474.

Almost surely, 2^{66560700557944} is an apocalyptic number.

It is an amenable number.

66560700557944 is a deficient number, since it is larger than the sum of its proper divisors (59193294772976).

66560700557944 is a wasteful number, since it uses less digits than its factorization.

66560700557944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63512118990 (or 63512118986 counting only the distinct ones).

The product of its (nonzero) digits is 190512000, while the sum is 64.

The spelling of 66560700557944 in words is "sixty-six trillion, five hundred sixty billion, seven hundred million, five hundred fifty-seven thousand, nine hundred forty-four".