87565870665 has 192 divisors, whose sum is σ = 205286457600. Its totient is φ = 35005436928.

The previous prime is 87565870633. The next prime is 87565870681. The reversal of 87565870665 is 56607856578.

It is a happy number.

87565870665 is a `hidden beast` number, since 8 + 7 + 565 + 8 + 7 + 0 + 6 + 65 = 666.

It is not a de Polignac number, because 87565870665 - 2⁵ = 87565870633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1607109 + ... + 1660701.

It is an arithmetic number, because the mean of its divisors is an integer number (1069200300).

Almost surely, 2^87565870665 is an apocalyptic number.

It is an amenable number.

87565870665 is an abundant number, since it is smaller than the sum of its proper divisors (117720586935).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87565870665 is a wasteful number, since it uses less digits than its factorization.

87565870665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53653 (or 53640 counting only the distinct ones).

The product of its (nonzero) digits is 84672000, while the sum is 63.

The spelling of 87565870665 in words is "eighty-seven billion, five hundred sixty-five million, eight hundred seventy thousand, six hundred sixty-five".