86666597 has 4 divisors (see below), whose sum is σ = 86685600. Its totient is φ = 86647596.

The previous prime is 86666563. The next prime is 86666603. The reversal of 86666597 is 79566668.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86666597 - 2⁸ = 86666341 is a prime.

It is a super-2 number, since 2×86666597² = 15022198071120818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86660597) 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, 1904 + ... + 13302.

It is an arithmetic number, because the mean of its divisors is an integer number (21671400).

Almost surely, 2^86666597 is an apocalyptic number.

It is an amenable number.

86666597 is a deficient number, since it is larger than the sum of its proper divisors (19003).

86666597 is a wasteful number, since it uses less digits than its factorization.

86666597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19002.

The product of its digits is 3265920, while the sum is 53.

The square root of 86666597 is about 9309.4896208117. The cubic root of 86666597 is about 442.5380128430.

The spelling of 86666597 in words is "eighty-six million, six hundred sixty-six thousand, five hundred ninety-seven".