866888668 has 12 divisors (see below), whose sum is σ = 1517462352. Its totient is φ = 433328000.

The previous prime is 866888609. The next prime is 866888683.

It is a happy number.

866888668 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 11080 + ... + 43087.

It is an arithmetic number, because the mean of its divisors is an integer number (126455196).

Almost surely, 2^866888668 is an apocalyptic number.

It is an amenable number.

866888668 is a deficient number, since it is larger than the sum of its proper divisors (650573684).

866888668 is a wasteful number, since it uses less digits than its factorization.

866888668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58172 (or 58170 counting only the distinct ones).

The product of its digits is 42467328, while the sum is 64.

The square root of 866888668 is about 29442.9731515009. The cubic root of 866888668 is about 953.5009028908.

It can be divided in two parts, 8668 and 88668, that added together give a cube (97336 = 46³).

The spelling of 866888668 in words is "eight hundred sixty-six million, eight hundred eighty-eight thousand, six hundred sixty-eight".