866827377105766 has 16 divisors (see below), whose sum is σ = 1330636479554448. Its totient is φ = 423284266490400.

The previous prime is 866827377105733. The next prime is 866827377105769. The reversal of 866827377105766 is 667501773728668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866827377105769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594910465 + ... + 596365756.

It is an arithmetic number, because the mean of its divisors is an integer number (83164779972153).

Almost surely, 2^{866827377105766} is an apocalyptic number.

866827377105766 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

866827377105766 is a deficient number, since it is larger than the sum of its proper divisors (463809102448682).

866827377105766 is a wasteful number, since it uses less digits than its factorization.

866827377105766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191284727.

The product of its (nonzero) digits is 5974456320, while the sum is 79.

The spelling of 866827377105766 in words is "eight hundred sixty-six trillion, eight hundred twenty-seven billion, three hundred seventy-seven million, one hundred five thousand, seven hundred sixty-six".