5515616566566 has 24 divisors (see below), whose sum is σ = 12393113767944. Its totient is φ = 1838538855360.

The previous prime is 5515616566549. The next prime is 5515616566583. The reversal of 5515616566566 is 6656656165155.

5515616566566 is a `hidden beast` number, since 5 + 5 + 1 + 5 + 6 + 1 + 6 + 5 + 66 + 566 = 666.

It is an interprime number because it is at equal distance from previous prime (5515616566549) and next prime (5515616566583).

It is a super-2 number, since 2×5515616566566² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

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, 5674502155 + ... + 5674503126.

It is an arithmetic number, because the mean of its divisors is an integer number (516379740331).

Almost surely, 2^{5515616566566} is an apocalyptic number.

5515616566566 is an abundant number, since it is smaller than the sum of its proper divisors (6877497201378).

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

5515616566566 is a wasteful number, since it uses less digits than its factorization.

5515616566566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11349005298 (or 11349005286 counting only the distinct ones).

The product of its digits is 145800000, while the sum is 63.

The spelling of 5515616566566 in words is "five trillion, five hundred fifteen billion, six hundred sixteen million, five hundred sixty-six thousand, five hundred sixty-six".