866786274634444 has 12 divisors (see below), whose sum is σ = 1516981151340144. Its totient is φ = 433363088537264.

The previous prime is 866786274634349. The next prime is 866786274634451. The reversal of 866786274634444 is 444436472687668.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7512130087 + ... + 7512245470.

It is an arithmetic number, because the mean of its divisors is an integer number (126415095945012).

Almost surely, 2^{866786274634444} is an apocalyptic number.

It is an amenable number.

866786274634444 is a deficient number, since it is larger than the sum of its proper divisors (650194876705700).

866786274634444 is a wasteful number, since it uses less digits than its factorization.

866786274634444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15024389984 (or 15024389982 counting only the distinct ones).

The product of its digits is 24970788864, while the sum is 79.

The spelling of 866786274634444 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, two hundred seventy-four million, six hundred thirty-four thousand, four hundred forty-four".