866313853180687 has 2 divisors, whose sum is σ = 866313853180688. Its totient is φ = 866313853180686.

The previous prime is 866313853180631. The next prime is 866313853180723. The reversal of 866313853180687 is 786081358313668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866313853180687 - 2²⁷ = 866313718962959 is a prime.

It is a super-2 number, since 2×866313853180687² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866313853180187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433156926590343 + 433156926590344.

It is an arithmetic number, because the mean of its divisors is an integer number (433156926590344).

Almost surely, 2^{866313853180687} is an apocalyptic number.

866313853180687 is a deficient number, since it is larger than the sum of its proper divisors (1).

866313853180687 is an equidigital number, since it uses as much as digits as its factorization.

866313853180687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 836075520, while the sum is 73.

The spelling of 866313853180687 in words is "eight hundred sixty-six trillion, three hundred thirteen billion, eight hundred fifty-three million, one hundred eighty thousand, six hundred eighty-seven".