866222017356 has 12 divisors (see below), whose sum is σ = 2021184707192. Its totient is φ = 288740672448.

The previous prime is 866222017337. The next prime is 866222017369. The reversal of 866222017356 is 653710222668.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36092584045 + ... + 36092584068.

Almost surely, 2^866222017356 is an apocalyptic number.

It is an amenable number.

866222017356 is an abundant number, since it is smaller than the sum of its proper divisors (1154962689836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866222017356 is a wasteful number, since it uses less digits than its factorization.

866222017356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72185168120 (or 72185168118 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 866222017356 in words is "eight hundred sixty-six billion, two hundred twenty-two million, seventeen thousand, three hundred fifty-six".