866495900 has 18 divisors (see below), whose sum is σ = 1880296320. Its totient is φ = 346598320.

The previous prime is 866495897. The next prime is 866495921. The reversal of 866495900 is 9594668.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 4332380 + ... + 4332579.

Almost surely, 2^866495900 is an apocalyptic number.

It is an amenable number.

866495900 is an abundant number, since it is smaller than the sum of its proper divisors (1013800420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866495900 is a wasteful number, since it uses less digits than its factorization.

866495900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8664973 (or 8664966 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 866495900 is about 29436.3024172534. The cubic root of 866495900 is about 953.3568777771.

The spelling of 866495900 in words is "eight hundred sixty-six million, four hundred ninety-five thousand, nine hundred".