86665787528651 has 16 divisors (see below), whose sum is σ = 90587480254464. Its totient is φ = 82756910041344.

The previous prime is 86665787528629. The next prime is 86665787528653. The reversal of 86665787528651 is 15682578756668.

It is a cyclic number.

It is not a de Polignac number, because 86665787528651 - 2⁴² = 82267741017547 is a prime.

It is a super-2 number, since 2×86665787528651² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86665787528653) 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, 292292891 + ... + 292589243.

It is an arithmetic number, because the mean of its divisors is an integer number (5661717515904).

Almost surely, 2^{86665787528651} is an apocalyptic number.

86665787528651 is a deficient number, since it is larger than the sum of its proper divisors (3921692725813).

86665787528651 is a wasteful number, since it uses less digits than its factorization.

86665787528651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317930.

The product of its digits is 8128512000, while the sum is 80.

The spelling of 86665787528651 in words is "eighty-six trillion, six hundred sixty-five billion, seven hundred eighty-seven million, five hundred twenty-eight thousand, six hundred fifty-one".