866187234735768 has 96 divisors (see below), whose sum is σ = 2559195155733840. Its totient is φ = 262480406012160.

The previous prime is 866187234735749. The next prime is 866187234735803. The reversal of 866187234735768 is 867537432781668.

866187234735768 is a `hidden beast` number, since 8 + 6 + 6 + 1 + 8 + 7 + 2 + 34 + 7 + 3 + 576 + 8 = 666.

It is a super-2 number, since 2×866187234735768² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 486518530 + ... + 488295662.

Almost surely, 2^{866187234735768} is an apocalyptic number.

866187234735768 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

866187234735768 is an abundant number, since it is smaller than the sum of its proper divisors (1693007920998072).

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

866187234735768 is a wasteful number, since it uses less digits than its factorization.

866187234735768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2392569 (or 2392562 counting only the distinct ones).

The product of its digits is 13655900160, while the sum is 81.

The spelling of 866187234735768 in words is "eight hundred sixty-six trillion, one hundred eighty-seven billion, two hundred thirty-four million, seven hundred thirty-five thousand, seven hundred sixty-eight".