6665615200780 has 24 divisors (see below), whose sum is σ = 13997886346080. Its totient is φ = 2666228094720.

The previous prime is 6665615200759. The next prime is 6665615200831. The reversal of 6665615200780 is 870025165666.

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 7 ways as a sum of consecutive naturals, for example, 2147065 + ... + 4235695.

It is an arithmetic number, because the mean of its divisors is an integer number (583245264420).

Almost surely, 2^{6665615200780} is an apocalyptic number.

It is an amenable number.

6665615200780 is an abundant number, since it is smaller than the sum of its proper divisors (7332271145300).

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

6665615200780 is a wasteful number, since it uses less digits than its factorization.

6665615200780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2248209 (or 2248207 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 6665615200780 in words is "six trillion, six hundred sixty-five billion, six hundred fifteen million, two hundred thousand, seven hundred eighty".