86660999 has 2 divisors, whose sum is σ = 86661000. Its totient is φ = 86660998.

The previous prime is 86660983. The next prime is 86661011. The reversal of 86660999 is 99906668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86660999 - 2⁴ = 86660983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86660999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86660969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43330499 + 43330500.

It is an arithmetic number, because the mean of its divisors is an integer number (43330500).

Almost surely, 2^86660999 is an apocalyptic number.

86660999 is a deficient number, since it is larger than the sum of its proper divisors (1).

86660999 is an equidigital number, since it uses as much as digits as its factorization.

86660999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 53.

The square root of 86660999 is about 9309.1889550057. The cubic root of 86660999 is about 442.5284844464.

The spelling of 86660999 in words is "eighty-six million, six hundred sixty thousand, nine hundred ninety-nine".