866999884 has 12 divisors (see below), whose sum is σ = 1552534984. Its totient is φ = 423418464.

The previous prime is 866999879. The next prime is 866999897. The reversal of 866999884 is 488999668.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2520177 + ... + 2520520.

Almost surely, 2^866999884 is an apocalyptic number.

It is an amenable number.

866999884 is a deficient number, since it is larger than the sum of its proper divisors (685535100).

866999884 is a wasteful number, since it uses less digits than its factorization.

866999884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5040744 (or 5040742 counting only the distinct ones).

The product of its digits is 53747712, while the sum is 67.

The square root of 866999884 is about 29444.8617588876. The cubic root of 866999884 is about 953.5416770700.

The spelling of 866999884 in words is "eight hundred sixty-six million, nine hundred ninety-nine thousand, eight hundred eighty-four".