866786274765874 has 16 divisors (see below), whose sum is σ = 1303669998480960. Its totient is φ = 432229617252720.

The previous prime is 866786274765773. The next prime is 866786274765911. The reversal of 866786274765874 is 478567472687668.

It is a super-2 number, since 2×866786274765874² (a number of 31 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 212784859 + ... + 216820129.

It is an arithmetic number, because the mean of its divisors is an integer number (81479374905060).

Almost surely, 2^{866786274765874} is an apocalyptic number.

866786274765874 is a deficient number, since it is larger than the sum of its proper divisors (436883723715086).

866786274765874 is a wasteful number, since it uses less digits than its factorization.

866786274765874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4323585.

The product of its digits is 254910136320, while the sum is 91.

The spelling of 866786274765874 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, two hundred seventy-four million, seven hundred sixty-five thousand, eight hundred seventy-four".