866786464110251 has 4 divisors (see below), whose sum is σ = 912406804326600. Its totient is φ = 821166123893904.

The previous prime is 866786464110247. The next prime is 866786464110283. The reversal of 866786464110251 is 152011464687668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 866786464110251 - 2² = 866786464110247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866786464110241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22810170108146 + ... + 22810170108183.

It is an arithmetic number, because the mean of its divisors is an integer number (228101701081650).

Almost surely, 2^{866786464110251} is an apocalyptic number.

866786464110251 is a deficient number, since it is larger than the sum of its proper divisors (45620340216349).

866786464110251 is a wasteful number, since it uses less digits than its factorization.

866786464110251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45620340216348.

The product of its (nonzero) digits is 92897280, while the sum is 65.

The spelling of 866786464110251 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, four hundred sixty-four million, one hundred ten thousand, two hundred fifty-one".