66724762112631 has 32 divisors (see below), whose sum is σ = 113626166200320. Its totient is φ = 37908039893472.

The previous prime is 66724762112623. The next prime is 66724762112647. The reversal of 66724762112631 is 13621126742766.

66724762112631 is a `hidden beast` number, since 6 + 6 + 7 + 2 + 4 + 7 + 621 + 1 + 2 + 6 + 3 + 1 = 666.

It is not a de Polignac number, because 66724762112631 - 2³ = 66724762112623 is a prime.

It is a super-2 number, since 2×66724762112631² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66724762112621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1020317215 + ... + 1020382608.

It is an arithmetic number, because the mean of its divisors is an integer number (3550817693760).

Almost surely, 2^{66724762112631} is an apocalyptic number.

66724762112631 is a deficient number, since it is larger than the sum of its proper divisors (46901404087689).

66724762112631 is a wasteful number, since it uses less digits than its factorization.

66724762112631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040700012 (or 2040700006 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 54.

The spelling of 66724762112631 in words is "sixty-six trillion, seven hundred twenty-four billion, seven hundred sixty-two million, one hundred twelve thousand, six hundred thirty-one".