86634665 has 8 divisors (see below), whose sum is σ = 111958728. Its totient is φ = 63976320.

The previous prime is 86634659. The next prime is 86634671. The reversal of 86634665 is 56643668.

It is an interprime number because it is at equal distance from previous prime (86634659) and next prime (86634671).

It can be written as a sum of positive squares in 4 ways, for example, as 1607824 + 85026841 = 1268^2 + 9221^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 86634665 - 2¹⁶ = 86569129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 666356 + ... + 666485.

It is an arithmetic number, because the mean of its divisors is an integer number (13994841).

Almost surely, 2^86634665 is an apocalyptic number.

It is an amenable number.

86634665 is a deficient number, since it is larger than the sum of its proper divisors (25324063).

86634665 is a wasteful number, since it uses less digits than its factorization.

86634665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332859.

The product of its digits is 622080, while the sum is 44.

The square root of 86634665 is about 9307.7744386078. The cubic root of 86634665 is about 442.4836556466.

The spelling of 86634665 in words is "eighty-six million, six hundred thirty-four thousand, six hundred sixty-five".