866802187050557 has 8 divisors (see below), whose sum is σ = 912447097416960. Its totient is φ = 821159650946880.

The previous prime is 866802187050523. The next prime is 866802187050587. The reversal of 866802187050557 is 755050781208668.

866802187050557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 866802187050557 - 2⁸ = 866802187050301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866802187050587) 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, 592816268 + ... + 594276645.

It is an arithmetic number, because the mean of its divisors is an integer number (114055887177120).

Almost surely, 2^{866802187050557} is an apocalyptic number.

It is an amenable number.

866802187050557 is a deficient number, since it is larger than the sum of its proper divisors (45644910366403).

866802187050557 is a wasteful number, since it uses less digits than its factorization.

866802187050557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187131363.

The product of its (nonzero) digits is 225792000, while the sum is 68.

The spelling of 866802187050557 in words is "eight hundred sixty-six trillion, eight hundred two billion, one hundred eighty-seven million, fifty thousand, five hundred fifty-seven".