866808998 has 16 divisors (see below), whose sum is σ = 1419102720. Its totient is φ = 393813000.

The previous prime is 866808989. The next prime is 866809037. The reversal of 866808998 is 899808668.

It is a happy number.

866808998 is a strobogrammatic number because it is the same when read upside-down.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 866808998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43343 + ... + 60101.

It is an arithmetic number, because the mean of its divisors is an integer number (88693920).

Almost surely, 2^866808998 is an apocalyptic number.

866808998 is a deficient number, since it is larger than the sum of its proper divisors (552293722).

866808998 is a wasteful number, since it uses less digits than its factorization.

866808998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19123.

The product of its (nonzero) digits is 11943936, while the sum is 62.

The square root of 866808998 is about 29441.6201660167. The cubic root of 866808998 is about 953.4716920102.

The spelling of 866808998 in words is "eight hundred sixty-six million, eight hundred eight thousand, nine hundred ninety-eight".