7916862665 has 4 divisors (see below), whose sum is σ = 9500235204. Its totient is φ = 6333490128.

The previous prime is 7916862661. The next prime is 7916862671. The reversal of 7916862665 is 5662686197.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5662686197 = 7 ⋅808955171.

It can be written as a sum of positive squares in 2 ways, for example, as 4559355529 + 3357507136 = 67523^2 + 57944^2 .

It is a cyclic number.

It is not a de Polignac number, because 7916862665 - 2² = 7916862661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7916862665.

It is not an unprimeable number, because it can be changed into a prime (7916862661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 791686262 + ... + 791686271.

It is an arithmetic number, because the mean of its divisors is an integer number (2375058801).

Almost surely, 2^7916862665 is an apocalyptic number.

It is an amenable number.

7916862665 is a deficient number, since it is larger than the sum of its proper divisors (1583372539).

7916862665 is a wasteful number, since it uses less digits than its factorization.

7916862665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583372538.

The product of its digits is 6531840, while the sum is 56.

The square root of 7916862665 is about 88976.7535089924. The cubic root of 7916862665 is about 1993.0477498614.

The spelling of 7916862665 in words is "seven billion, nine hundred sixteen million, eight hundred sixty-two thousand, six hundred sixty-five".