66666262464 has 112 divisors (see below), whose sum is σ = 206301644800. Its totient is φ = 21052493568.

The previous prime is 66666262417. The next prime is 66666262547. The reversal of 66666262464 is 46426266666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 66666262464.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 982432 + ... + 1048095.

Almost surely, 2^66666262464 is an apocalyptic number.

66666262464 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66666262464 is an abundant number, since it is smaller than the sum of its proper divisors (139635382336).

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

66666262464 is a wasteful number, since it uses less digits than its factorization.

66666262464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030567 (or 2030551 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 54.

The spelling of 66666262464 in words is "sixty-six billion, six hundred sixty-six million, two hundred sixty-two thousand, four hundred sixty-four".