5665161651 has 32 divisors (see below), whose sum is σ = 8175168000. Its totient is φ = 3476436480.

The previous prime is 5665161647. The next prime is 5665161703. The reversal of 5665161651 is 1561615665.

It is not a de Polignac number, because 5665161651 - 2² = 5665161647 is a prime.

It is a super-2 number, since 2×5665161651² = 64188113063922091602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5665161611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 594061 + ... + 603521.

It is an arithmetic number, because the mean of its divisors is an integer number (255474000).

Almost surely, 2^5665161651 is an apocalyptic number.

5665161651 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

5665161651 is a deficient number, since it is larger than the sum of its proper divisors (2510006349).

5665161651 is a wasteful number, since it uses less digits than its factorization.

5665161651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9739.

The product of its digits is 162000, while the sum is 42.

The square root of 5665161651 is about 75267.2681249957. The cubic root of 5665161651 is about 1782.6692321622.

The spelling of 5665161651 in words is "five billion, six hundred sixty-five million, one hundred sixty-one thousand, six hundred fifty-one".