5201556666660 has 36 divisors (see below), whose sum is σ = 15778055222748. Its totient is φ = 1387081777728.

The previous prime is 5201556666641. The next prime is 5201556666671. The reversal of 5201556666660 is 666666551025.

It can be written as a sum of positive squares in 2 ways, for example, as 3675625164864 + 1525931501796 = 1917192^2 + 1235286^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 5201556666597 and 5201556666606.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14448768339 + ... + 14448768698.

It is an arithmetic number, because the mean of its divisors is an integer number (438279311743).

Almost surely, 2^{5201556666660} is an apocalyptic number.

It is an amenable number.

5201556666660 is an abundant number, since it is smaller than the sum of its proper divisors (10576498556088).

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

5201556666660 is a wasteful number, since it uses less digits than its factorization.

5201556666660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28897537052 (or 28897537047 counting only the distinct ones).

The product of its (nonzero) digits is 11664000, while the sum is 54.

The spelling of 5201556666660 in words is "five trillion, two hundred one billion, five hundred fifty-six million, six hundred sixty-six thousand, six hundred sixty".