7716166065 has 24 divisors (see below), whose sum is σ = 13557908520. Its totient is φ = 4058913024.

The previous prime is 7716166049. The next prime is 7716166079. The reversal of 7716166065 is 5606616177.

It can be written as a sum of positive squares in 4 ways, for example, as 77580864 + 7638585201 = 8808^2 + 87399^2 .

It is not a de Polignac number, because 7716166065 - 2⁴ = 7716166049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 7716166065.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1171170 + ... + 1177739.

It is an arithmetic number, because the mean of its divisors is an integer number (564912855).

Almost surely, 2^7716166065 is an apocalyptic number.

It is an amenable number.

7716166065 is a deficient number, since it is larger than the sum of its proper divisors (5841742455).

7716166065 is a wasteful number, since it uses less digits than its factorization.

7716166065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348993 (or 2348990 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 7716166065 is about 87841.7102804812. The cubic root of 7716166065 is about 1976.0617964120.

The spelling of 7716166065 in words is "seven billion, seven hundred sixteen million, one hundred sixty-six thousand, sixty-five".