866761255268744 has 16 divisors (see below), whose sum is σ = 1772920749413520. Its totient is φ = 393982388758480.

The previous prime is 866761255268723. The next prime is 866761255268791. The reversal of 866761255268744 is 447862552167668.

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, 4924779859394 + ... + 4924779859569.

It is an arithmetic number, because the mean of its divisors is an integer number (110807546838345).

Almost surely, 2^{866761255268744} is an apocalyptic number.

It is an amenable number.

866761255268744 is an abundant number, since it is smaller than the sum of its proper divisors (906159494144776).

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

866761255268744 is a wasteful number, since it uses less digits than its factorization.

866761255268744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9849559718980 (or 9849559718976 counting only the distinct ones).

The product of its digits is 6502809600, while the sum is 77.

The spelling of 866761255268744 in words is "eight hundred sixty-six trillion, seven hundred sixty-one billion, two hundred fifty-five million, two hundred sixty-eight thousand, seven hundred forty-four".