7665714521 has 16 divisors (see below), whose sum is σ = 8125194240. Its totient is φ = 7211972880.

The previous prime is 7665714509. The next prime is 7665714541. The reversal of 7665714521 is 1254175667.

It is not a de Polignac number, because 7665714521 - 2⁶ = 7665714457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7665714541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2694926 + ... + 2697768.

It is an arithmetic number, because the mean of its divisors is an integer number (507824640).

Almost surely, 2^7665714521 is an apocalyptic number.

It is an amenable number.

7665714521 is a deficient number, since it is larger than the sum of its proper divisors (459479719).

7665714521 is a wasteful number, since it uses less digits than its factorization.

7665714521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3796.

The product of its digits is 352800, while the sum is 44.

The square root of 7665714521 is about 87554.0662733605. The cubic root of 7665714521 is about 1971.7456008647.

The spelling of 7665714521 in words is "seven billion, six hundred sixty-five million, seven hundred fourteen thousand, five hundred twenty-one".