7971166065 has 32 divisors (see below), whose sum is σ = 13057900416. Its totient is φ = 4150056960.

The previous prime is 7971166061. The next prime is 7971166081. The reversal of 7971166065 is 5606611797.

It is not a de Polignac number, because 7971166065 - 2² = 7971166061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7971166061) 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, 2166007 + ... + 2169683.

It is an arithmetic number, because the mean of its divisors is an integer number (408059388).

Almost surely, 2^7971166065 is an apocalyptic number.

It is an amenable number.

7971166065 is a deficient number, since it is larger than the sum of its proper divisors (5086734351).

7971166065 is a wasteful number, since it uses less digits than its factorization.

7971166065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7089.

The product of its (nonzero) digits is 476280, while the sum is 48.

The square root of 7971166065 is about 89281.3870019950. The cubic root of 7971166065 is about 1997.5942794980.

The spelling of 7971166065 in words is "seven billion, nine hundred seventy-one million, one hundred sixty-six thousand, sixty-five".