866764980964 has 12 divisors (see below), whose sum is σ = 1516863905788. Its totient is φ = 433375293600.

The previous prime is 866764980959. The next prime is 866764981003. The reversal of 866764980964 is 469089467668.

It can be written as a sum of positive squares in 2 ways, for example, as 521500622500 + 345264358464 = 722150^2 + 587592^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1523547 + ... + 2013634.

Almost surely, 2^866764980964 is an apocalyptic number.

It is an amenable number.

866764980964 is a deficient number, since it is larger than the sum of its proper divisors (650098924824).

866764980964 is a wasteful number, since it uses less digits than its factorization.

866764980964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3598446 (or 3598444 counting only the distinct ones).

The product of its (nonzero) digits is 752467968, while the sum is 73.

The spelling of 866764980964 in words is "eight hundred sixty-six billion, seven hundred sixty-four million, nine hundred eighty thousand, nine hundred sixty-four".