87570665 has 16 divisors (see below), whose sum is σ = 129335808. Its totient is φ = 55429056.

The previous prime is 87570649. The next prime is 87570667. The reversal of 87570665 is 56607578.

It is a cyclic number.

It is not a de Polignac number, because 87570665 - 2⁴ = 87570649 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87570667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95777 + ... + 96686.

It is an arithmetic number, because the mean of its divisors is an integer number (8083488).

Almost surely, 2^87570665 is an apocalyptic number.

It is an amenable number.

87570665 is a deficient number, since it is larger than the sum of its proper divisors (41765143).

87570665 is a wasteful number, since it uses less digits than its factorization.

87570665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192488.

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

The square root of 87570665 is about 9357.9199077573. The cubic root of 87570665 is about 444.0714805918.

The spelling of 87570665 in words is "eighty-seven million, five hundred seventy thousand, six hundred sixty-five".