6666391832 has 64 divisors (see below), whose sum is σ = 14160031200. Its totient is φ = 2923223040.

The previous prime is 6666391819. The next prime is 6666391859. The reversal of 6666391832 is 2381936666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136478 + ... + 178770.

Almost surely, 2^6666391832 is an apocalyptic number.

It is an amenable number.

6666391832 is an abundant number, since it is smaller than the sum of its proper divisors (7493639368).

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

6666391832 is a wasteful number, since it uses less digits than its factorization.

6666391832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42396 (or 42392 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 50.

The square root of 6666391832 is about 81647.9750636842. The cubic root of 6666391832 is about 1882.0461944743.

The spelling of 6666391832 in words is "six billion, six hundred sixty-six million, three hundred ninety-one thousand, eight hundred thirty-two".