66513672715 has 32 divisors (see below), whose sum is σ = 93683589120. Its totient is φ = 44392272000.

The previous prime is 66513672713. The next prime is 66513672751. The reversal of 66513672715 is 51727631566.

66513672715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66513672715 - 2¹ = 66513672713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66513672713) 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, 49110 + ... + 368020.

It is an arithmetic number, because the mean of its divisors is an integer number (2927612160).

Almost surely, 2^66513672715 is an apocalyptic number.

66513672715 is a deficient number, since it is larger than the sum of its proper divisors (27169916405).

66513672715 is a wasteful number, since it uses less digits than its factorization.

66513672715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319083.

The product of its digits is 1587600, while the sum is 49.

The spelling of 66513672715 in words is "sixty-six billion, five hundred thirteen million, six hundred seventy-two thousand, seven hundred fifteen".