866831443043731 has 8 divisors (see below), whose sum is σ = 986748836350464. Its totient is φ = 753766472211720.

The previous prime is 866831443043717. The next prime is 866831443043779. The reversal of 866831443043731 is 137340344138668.

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

It is not a de Polignac number, because 866831443043731 - 2⁷ = 866831443043603 is a prime.

It is a super-2 number, since 2×866831443043731² (a number of 31 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 866831443043731.

It is not an unprimeable number, because it can be changed into a prime (866831443043701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1713105618411 + ... + 1713105618916.

It is an arithmetic number, because the mean of its divisors is an integer number (123343604543808).

Almost surely, 2^{866831443043731} is an apocalyptic number.

866831443043731 is a deficient number, since it is larger than the sum of its proper divisors (119917393306733).

866831443043731 is a wasteful number, since it uses less digits than its factorization.

866831443043731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3426211237361.

The product of its (nonzero) digits is 83607552, while the sum is 61.

The spelling of 866831443043731 in words is "eight hundred sixty-six trillion, eight hundred thirty-one billion, four hundred forty-three million, forty-three thousand, seven hundred thirty-one".