86660839 has 4 divisors (see below), whose sum is σ = 88774560. Its totient is φ = 84547120.

The previous prime is 86660837. The next prime is 86660851. The reversal of 86660839 is 93806668.

It is a happy number.

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 86660839 - 2¹ = 86660837 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 (86660837) 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, 1056799 + ... + 1056880.

It is an arithmetic number, because the mean of its divisors is an integer number (22193640).

Almost surely, 2^86660839 is an apocalyptic number.

86660839 is a deficient number, since it is larger than the sum of its proper divisors (2113721).

86660839 is a wasteful number, since it uses less digits than its factorization.

86660839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113720.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 86660839 is about 9309.1803613422. The cubic root of 86660839 is about 442.5282121032.

The spelling of 86660839 in words is "eighty-six million, six hundred sixty thousand, eight hundred thirty-nine".