86665331 has 4 divisors (see below), whose sum is σ = 86789664. Its totient is φ = 86541000.

The previous prime is 86665309. The next prime is 86665351. The reversal of 86665331 is 13356668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86665331 - 2²² = 82471027 is a prime.

It is a super-2 number, since 2×86665331² = 15021759194679122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (86665351) 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 3 ways as a sum of consecutive naturals, for example, 61115 + ... + 62516.

It is an arithmetic number, because the mean of its divisors is an integer number (21697416).

Almost surely, 2^86665331 is an apocalyptic number.

86665331 is a deficient number, since it is larger than the sum of its proper divisors (124333).

86665331 is a wasteful number, since it uses less digits than its factorization.

86665331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124332.

The product of its digits is 77760, while the sum is 38.

The square root of 86665331 is about 9309.4216254287. The cubic root of 86665331 is about 442.5358580111.

The spelling of 86665331 in words is "eighty-six million, six hundred sixty-five thousand, three hundred thirty-one".