66131162736 has 40 divisors (see below), whose sum is σ = 170918822400. Its totient is φ = 22033400256.

The previous prime is 66131162723. The next prime is 66131162737. The reversal of 66131162736 is 63726113166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66131162737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218586 + ... + 424313.

It is an arithmetic number, because the mean of its divisors is an integer number (4272970560).

Almost surely, 2^66131162736 is an apocalyptic number.

It is an amenable number.

66131162736 is an abundant number, since it is smaller than the sum of its proper divisors (104787659664).

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

66131162736 is a wasteful number, since it uses less digits than its factorization.

66131162736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645053 (or 645047 counting only the distinct ones).

The product of its digits is 163296, while the sum is 42.

The spelling of 66131162736 in words is "sixty-six billion, one hundred thirty-one million, one hundred sixty-two thousand, seven hundred thirty-six".