66135231232651 has 16 divisors (see below), whose sum is σ = 78272882735040. Its totient is φ = 54674192401920.

The previous prime is 66135231232613. The next prime is 66135231232723. The reversal of 66135231232651 is 15623213253166.

It is not a de Polignac number, because 66135231232651 - 2²⁹ = 66134694361739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66135231232451) 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, 173656810 + ... + 174037231.

It is an arithmetic number, because the mean of its divisors is an integer number (4892055170940).

Almost surely, 2^{66135231232651} is an apocalyptic number.

66135231232651 is a deficient number, since it is larger than the sum of its proper divisors (12137651502389).

66135231232651 is a wasteful number, since it uses less digits than its factorization.

66135231232651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347695014.

The product of its digits is 1166400, while the sum is 46.

The spelling of 66135231232651 in words is "sixty-six trillion, one hundred thirty-five billion, two hundred thirty-one million, two hundred thirty-two thousand, six hundred fifty-one".