866948748980 has 48 divisors (see below), whose sum is σ = 1863804905424. Its totient is φ = 338642611200.

The previous prime is 866948748979. The next prime is 866948749003. The reversal of 866948748980 is 89847849668.

It can be written as a sum of positive squares in 8 ways, for example, as 237157312144 + 629791436836 = 486988^2 + 793594^2 .

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 15 ways as a sum of consecutive naturals, for example, 2792147 + ... + 3087066.

It is an arithmetic number, because the mean of its divisors is an integer number (38829268863).

Almost surely, 2^866948748980 is an apocalyptic number.

It is an amenable number.

866948748980 is an abundant number, since it is smaller than the sum of its proper divisors (996856156444).

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

866948748980 is a wasteful number, since it uses less digits than its factorization.

866948748980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5879396 (or 5879394 counting only the distinct ones).

The product of its (nonzero) digits is 1337720832, while the sum is 77.

The spelling of 866948748980 in words is "eight hundred sixty-six billion, nine hundred forty-eight million, seven hundred forty-eight thousand, nine hundred eighty".