66415363231 has 16 divisors (see below), whose sum is σ = 79241025600. Its totient is φ = 54460159488.

The previous prime is 66415363177. The next prime is 66415363253. The reversal of 66415363231 is 13236351466.

It is not a de Polignac number, because 66415363231 - 2⁷ = 66415363103 is a prime.

It is a super-2 number, since 2×66415363231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66415363031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1478650 + ... + 1522903.

It is an arithmetic number, because the mean of its divisors is an integer number (4952564100).

Almost surely, 2^66415363231 is an apocalyptic number.

66415363231 is a deficient number, since it is larger than the sum of its proper divisors (12825662369).

66415363231 is a wasteful number, since it uses less digits than its factorization.

66415363231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3001698.

The product of its digits is 233280, while the sum is 40.

The spelling of 66415363231 in words is "sixty-six billion, four hundred fifteen million, three hundred sixty-three thousand, two hundred thirty-one".