866880649082 has 12 divisors (see below), whose sum is σ = 1512618275610. Its totient is φ = 371520278136.

The previous prime is 866880649049. The next prime is 866880649093. The reversal of 866880649082 is 280946088668.

It can be written as a sum of positive squares in only one way, i.e., 443781136561 + 423099512521 = 666169^2 + 650461^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4422860357 + ... + 4422860552.

Almost surely, 2^866880649082 is an apocalyptic number.

866880649082 is a deficient number, since it is larger than the sum of its proper divisors (645737626528).

866880649082 is a wasteful number, since it uses less digits than its factorization.

866880649082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8845720925 (or 8845720918 counting only the distinct ones).

The product of its (nonzero) digits is 63700992, while the sum is 65.

The spelling of 866880649082 in words is "eight hundred sixty-six billion, eight hundred eighty million, six hundred forty-nine thousand, eighty-two".