866786463837064 has 16 divisors (see below), whose sum is σ = 1626048352425420. Its totient is φ = 433173569856960.

The previous prime is 866786463837011. The next prime is 866786463837067. The reversal of 866786463837064 is 460738364687668.

It can be written as a sum of positive squares in 2 ways, for example, as 850044929580900 + 16741534256164 = 29155530^2 + 4091642^2 .

It is not an unprimeable number, because it can be changed into a prime (866786463837067) 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, 27457740927 + ... + 27457772494.

Almost surely, 2^{866786463837064} is an apocalyptic number.

It is an amenable number.

866786463837064 is a deficient number, since it is larger than the sum of its proper divisors (759261888588356).

866786463837064 is a wasteful number, since it uses less digits than its factorization.

866786463837064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54915515400 (or 54915515396 counting only the distinct ones).

The product of its (nonzero) digits is 28092137472, while the sum is 82.

The spelling of 866786463837064 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, four hundred sixty-three million, eight hundred thirty-seven thousand, sixty-four".