6666788696 has 16 divisors (see below), whose sum is σ = 12766191840. Its totient is φ = 3262470880.

The previous prime is 6666788677. The next prime is 6666788701. The reversal of 6666788696 is 6968876666.

It is a super-2 number, since 2×6666788696² = 88892143034226760832, which contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 8865035 + ... + 8865786.

It is an arithmetic number, because the mean of its divisors is an integer number (797886990).

Almost surely, 2^6666788696 is an apocalyptic number.

It is an amenable number.

6666788696 is a deficient number, since it is larger than the sum of its proper divisors (6099403144).

6666788696 is a wasteful number, since it uses less digits than its factorization.

6666788696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17730874 (or 17730870 counting only the distinct ones).

The product of its digits is 188116992, while the sum is 68.

The square root of 6666788696 is about 81650.4053633538. The cubic root of 6666788696 is about 1882.0835410919.

The spelling of 6666788696 in words is "six billion, six hundred sixty-six million, seven hundred eighty-eight thousand, six hundred ninety-six".