6656386477875 has 32 divisors (see below), whose sum is σ = 11077637096448. Its totient is φ = 3549620866400.

The previous prime is 6656386477837. The next prime is 6656386477889. The reversal of 6656386477875 is 5787746836566.

6656386477875 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6656386477875 - 2¹⁹ = 6656385953587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6656386477875.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1830262 + ... + 4081988.

It is an arithmetic number, because the mean of its divisors is an integer number (346176159264).

Almost surely, 2^{6656386477875} is an apocalyptic number.

6656386477875 is a deficient number, since it is larger than the sum of its proper divisors (4421250618573).

6656386477875 is a wasteful number, since it uses less digits than its factorization.

6656386477875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2259628 (or 2259618 counting only the distinct ones).

The product of its digits is 8534937600, while the sum is 78.

The spelling of 6656386477875 in words is "six trillion, six hundred fifty-six billion, three hundred eighty-six million, four hundred seventy-seven thousand, eight hundred seventy-five".