66666272076 has 60 divisors (see below), whose sum is σ = 178529541960. Its totient is φ = 21680084160.

The previous prime is 66666272063. The next prime is 66666272081. The reversal of 66666272076 is 67027266666.

It is a super-2 number, since 2×66666272076² (a number of 22 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2495986 + ... + 2522553.

It is an arithmetic number, because the mean of its divisors is an integer number (2975492366).

Almost surely, 2^66666272076 is an apocalyptic number.

It is an amenable number.

66666272076 is an abundant number, since it is smaller than the sum of its proper divisors (111863269884).

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

66666272076 is a wasteful number, since it uses less digits than its factorization.

66666272076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5018596 (or 5018585 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 54.

The spelling of 66666272076 in words is "sixty-six billion, six hundred sixty-six million, two hundred seventy-two thousand, seventy-six".