6656551612015 has 16 divisors (see below), whose sum is σ = 8443456819200. Its totient is φ = 5023856773152.

The previous prime is 6656551611961. The next prime is 6656551612019. The reversal of 6656551612015 is 5102161556566.

It is a cyclic number.

It is not a de Polignac number, because 6656551612015 - 2²⁷ = 6656417394287 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6656551612015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6656551612019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146565087 + ... + 146610496.

It is an arithmetic number, because the mean of its divisors is an integer number (527716051200).

Almost surely, 2^{6656551612015} is an apocalyptic number.

6656551612015 is a deficient number, since it is larger than the sum of its proper divisors (1786905207185).

6656551612015 is a wasteful number, since it uses less digits than its factorization.

6656551612015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293175846.

The product of its (nonzero) digits is 1620000, while the sum is 49.

The spelling of 6656551612015 in words is "six trillion, six hundred fifty-six billion, five hundred fifty-one million, six hundred twelve thousand, fifteen".