5665166655651 has 24 divisors (see below), whose sum is σ = 8266751823200. Its totient is φ = 3738328298496.

The previous prime is 5665166655593. The next prime is 5665166655661. The reversal of 5665166655651 is 1565566615665.

It is not a de Polignac number, because 5665166655651 - 2¹⁵ = 5665166622883 is a prime.

It is a super-2 number, since 2×5665166655651² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5665166655661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7848976 + ... + 8540301.

Almost surely, 2^{5665166655651} is an apocalyptic number.

5665166655651 is a deficient number, since it is larger than the sum of its proper divisors (2601585167549).

5665166655651 is a wasteful number, since it uses less digits than its factorization.

5665166655651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16389675 (or 16389672 counting only the distinct ones).

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

The spelling of 5665166655651 in words is "five trillion, six hundred sixty-five billion, one hundred sixty-six million, six hundred fifty-five thousand, six hundred fifty-one".