66402014839775 has 12 divisors (see below), whose sum is σ = 82338608135400. Its totient is φ = 53121541075680.

The previous prime is 66402014839663. The next prime is 66402014839777. The reversal of 66402014839775 is 57793841020466.

It is a happy number.

It is not a de Polignac number, because 66402014839775 - 2⁸ = 66402014839519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66402014839777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25760636 + ... + 28220814.

It is an arithmetic number, because the mean of its divisors is an integer number (6861550677950).

It is a 2-persistent number, because it is pandigital, and so is 2⋅66402014839775 = 132804029679550, but 3⋅66402014839775 = 199206044519325 is not.

Almost surely, 2^{66402014839775} is an apocalyptic number.

66402014839775 is a deficient number, since it is larger than the sum of its proper divisors (15936593295625).

66402014839775 is a wasteful number, since it uses less digits than its factorization.

66402014839775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3539818 (or 3539813 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 62.

The spelling of 66402014839775 in words is "sixty-six trillion, four hundred two billion, fourteen million, eight hundred thirty-nine thousand, seven hundred seventy-five".