87660625 has 20 divisors (see below), whose sum is σ = 117977860. Its totient is φ = 64728000.

The previous prime is 87660611. The next prime is 87660667. The reversal of 87660625 is 52606678.

It can be written as a sum of positive squares in 10 ways, for example, as 80838081 + 6822544 = 8991^2 + 2612^2 .

It is not a de Polignac number, because 87660625 - 2⁷ = 87660497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2731 + ... + 13519.

It is an arithmetic number, because the mean of its divisors is an integer number (5898893).

Almost surely, 2^87660625 is an apocalyptic number.

It is an amenable number.

87660625 is a deficient number, since it is larger than the sum of its proper divisors (30317235).

87660625 is a wasteful number, since it uses less digits than its factorization.

87660625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10822 (or 10807 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 87660625 is about 9362.7252976898. The cubic root of 87660625 is about 444.2234911562.

The spelling of 87660625 in words is "eighty-seven million, six hundred sixty thousand, six hundred twenty-five".