66666882 has 16 divisors (see below), whose sum is σ = 137931840. Its totient is φ = 21455952.

The previous prime is 66666881. The next prime is 66666913. The reversal of 66666882 is 28866666.

It is not an unprimeable number, because it can be changed into a prime (66666881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191398 + ... + 191745.

It is an arithmetic number, because the mean of its divisors is an integer number (8620740).

Almost surely, 2^66666882 is an apocalyptic number.

66666882 is an abundant number, since it is smaller than the sum of its proper divisors (71264958).

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

66666882 is a wasteful number, since it uses less digits than its factorization.

66666882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383177.

The product of its digits is 995328, while the sum is 48.

The square root of 66666882 is about 8164.9789956864. The cubic root of 66666882 is about 405.4805696047.

The spelling of 66666882 in words is "sixty-six million, six hundred sixty-six thousand, eight hundred eighty-two".