866080999 has 8 divisors (see below), whose sum is σ = 989992448. Its totient is φ = 742215960.

The previous prime is 866080981. The next prime is 866081011. The reversal of 866080999 is 999080668.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 866080999 - 2⁵ = 866080967 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 (866080909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50734 + ... + 65620.

It is an arithmetic number, because the mean of its divisors is an integer number (123749056).

Almost surely, 2^866080999 is an apocalyptic number.

866080999 is a deficient number, since it is larger than the sum of its proper divisors (123911449).

866080999 is a wasteful number, since it uses less digits than its factorization.

866080999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23205.

The product of its (nonzero) digits is 1679616, while the sum is 55.

The square root of 866080999 is about 29429.2541359784. The cubic root of 866080999 is about 953.2046893780.

The spelling of 866080999 in words is "eight hundred sixty-six million, eighty thousand, nine hundred ninety-nine".