866124188671312 has 40 divisors (see below), whose sum is σ = 1679949898360704. Its totient is φ = 432588887157504.

The previous prime is 866124188671267. The next prime is 866124188671321. The reversal of 866124188671312 is 213176881421668.

It is a happy number.

It is a super-2 number, since 2×866124188671312² (a number of 31 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83939868 + ... + 93691780.

Almost surely, 2^{866124188671312} is an apocalyptic number.

It is an amenable number.

866124188671312 is a deficient number, since it is larger than the sum of its proper divisors (813825709689392).

866124188671312 is a wasteful number, since it uses less digits than its factorization.

866124188671312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9757987 (or 9757981 counting only the distinct ones).

The product of its digits is 37158912, while the sum is 64.

The spelling of 866124188671312 in words is "eight hundred sixty-six trillion, one hundred twenty-four billion, one hundred eighty-eight million, six hundred seventy-one thousand, three hundred twelve".