866761254834455 has 16 divisors (see below), whose sum is σ = 1068112329508224. Its totient is φ = 674906142205440.

The previous prime is 866761254834439. The next prime is 866761254834473. The reversal of 866761254834455 is 554438452167668.

It is not a de Polignac number, because 866761254834455 - 2⁴ = 866761254834439 is a prime.

It is a super-2 number, since 2×866761254834455² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10188757922 + ... + 10188842991.

It is an arithmetic number, because the mean of its divisors is an integer number (66757020594264).

Almost surely, 2^{866761254834455} is an apocalyptic number.

866761254834455 is a deficient number, since it is larger than the sum of its proper divisors (201351074673769).

866761254834455 is a wasteful number, since it uses less digits than its factorization.

866761254834455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20377601146.

The product of its digits is 4644864000, while the sum is 74.

The spelling of 866761254834455 in words is "eight hundred sixty-six trillion, seven hundred sixty-one billion, two hundred fifty-four million, eight hundred thirty-four thousand, four hundred fifty-five".