86651567 has 4 divisors (see below), whose sum is σ = 91748736. Its totient is φ = 81554400.

The previous prime is 86651563. The next prime is 86651599. The reversal of 86651567 is 76515668.

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 86651567 - 2² = 86651563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86651563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2548559 + ... + 2548592.

It is an arithmetic number, because the mean of its divisors is an integer number (22937184).

Almost surely, 2^86651567 is an apocalyptic number.

86651567 is a deficient number, since it is larger than the sum of its proper divisors (5097169).

86651567 is a wasteful number, since it uses less digits than its factorization.

86651567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5097168.

The product of its digits is 302400, while the sum is 44.

The square root of 86651567 is about 9308.6823449938. The cubic root of 86651567 is about 442.5124292422.

The spelling of 86651567 in words is "eighty-six million, six hundred fifty-one thousand, five hundred sixty-seven".