866622560 has 48 divisors (see below), whose sum is σ = 2049255936. Its totient is φ = 346334208.

The previous prime is 866622553. The next prime is 866622629. The reversal of 866622560 is 65226668.

866622560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 264452 + ... + 267708.

It is an arithmetic number, because the mean of its divisors is an integer number (42692832).

Almost surely, 2^866622560 is an apocalyptic number.

866622560 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

866622560 is an abundant number, since it is smaller than the sum of its proper divisors (1182633376).

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

866622560 is a wasteful number, since it uses less digits than its factorization.

866622560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4935 (or 4927 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 866622560 is about 29438.4537637424. The cubic root of 866622560 is about 953.4033278138.

The spelling of 866622560 in words is "eight hundred sixty-six million, six hundred twenty-two thousand, five hundred sixty".