66046117938 has 32 divisors (see below), whose sum is σ = 133870838400. Its totient is φ = 21720529536.

The previous prime is 66046117871. The next prime is 66046117967. The reversal of 66046117938 is 83971164066.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32403 + ... + 364886.

It is an arithmetic number, because the mean of its divisors is an integer number (4183463700).

Almost surely, 2^66046117938 is an apocalyptic number.

66046117938 is an abundant number, since it is smaller than the sum of its proper divisors (67824720462).

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

66046117938 is a wasteful number, since it uses less digits than its factorization.

66046117938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397666.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 66046117938 in words is "sixty-six billion, forty-six million, one hundred seventeen thousand, nine hundred thirty-eight".