866990880 has 144 divisors (see below), whose sum is σ = 3381303744. Its totient is φ = 198167040.

The previous prime is 866990867. The next prime is 866990923. The reversal of 866990880 is 88099668.

866990880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32926 + ... + 53085.

It is an arithmetic number, because the mean of its divisors is an integer number (23481276).

Almost surely, 2^866990880 is an apocalyptic number.

866990880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

866990880 is an abundant number, since it is smaller than the sum of its proper divisors (2514312864).

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

866990880 is a wasteful number, since it uses less digits than its factorization.

866990880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86039 (or 86028 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The square root of 866990880 is about 29444.7088625444. The cubic root of 866990880 is about 953.5383761396.

The spelling of 866990880 in words is "eight hundred sixty-six million, nine hundred ninety thousand, eight hundred eighty".