86651 has 4 divisors (see below), whose sum is σ = 87912. Its totient is φ = 85392.

The previous prime is 86629. The next prime is 86677. The reversal of 86651 is 15668.

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 86651 - 2⁶ = 86587 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 86651.

It is not an unprimeable number, because it can be changed into a prime (86351) 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, 521 + ... + 666.

It is an arithmetic number, because the mean of its divisors is an integer number (21978).

2⁸⁶⁶⁵¹ is an apocalyptic number.

86651 is a deficient number, since it is larger than the sum of its proper divisors (1261).

86651 is a wasteful number, since it uses less digits than its factorization.

86651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260.

The product of its digits is 1440, while the sum is 26.

The square root of 86651 is about 294.3654191647. The cubic root of 86651 is about 44.2511464054.

It can be divided in two parts, 86 and 651, that added together give a palindrome (737).

The spelling of 86651 in words is "eighty-six thousand, six hundred fifty-one".