66313674405 has 128 divisors (see below), whose sum is σ = 135233556480. Its totient is φ = 30517344000.

The previous prime is 66313674389. The next prime is 66313674407. The reversal of 66313674405 is 50447631366.

66313674405 is a `hidden beast` number, since 6 + 631 + 3 + 6 + 7 + 4 + 4 + 0 + 5 = 666.

It is not a de Polignac number, because 66313674405 - 2⁴ = 66313674389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66313674407) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4466895 + ... + 4481715.

It is an arithmetic number, because the mean of its divisors is an integer number (1056512160).

Almost surely, 2^66313674405 is an apocalyptic number.

It is an amenable number.

66313674405 is an abundant number, since it is smaller than the sum of its proper divisors (68919882075).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66313674405 is a wasteful number, since it uses less digits than its factorization.

66313674405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15000 (or 14994 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 45.

The spelling of 66313674405 in words is "sixty-six billion, three hundred thirteen million, six hundred seventy-four thousand, four hundred five".