6660640404402 has 16 divisors (see below), whose sum is σ = 13344692556960. Its totient is φ = 2216311510112.

The previous prime is 6660640404389. The next prime is 6660640404413. The reversal of 6660640404402 is 2044040460666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 975485808 + ... + 975492635.

It is an arithmetic number, because the mean of its divisors is an integer number (834043284810).

Almost surely, 2^{6660640404402} is an apocalyptic number.

6660640404402 is an abundant number, since it is smaller than the sum of its proper divisors (6684052152558).

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

6660640404402 is a wasteful number, since it uses less digits than its factorization.

6660640404402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950979017.

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 6660640404402 in words is "six trillion, six hundred sixty billion, six hundred forty million, four hundred four thousand, four hundred two".