866942818031 has 8 divisors (see below), whose sum is σ = 886232491200. Its totient is φ = 847688315008.

The previous prime is 866942817997. The next prime is 866942818073. The reversal of 866942818031 is 130818249668.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866942818031 is a prime.

It is a super-2 number, since 2×866942818031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866942818531) 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, 8742686 + ... + 8841291.

It is an arithmetic number, because the mean of its divisors is an integer number (110779061400).

Almost surely, 2^866942818031 is an apocalyptic number.

866942818031 is a deficient number, since it is larger than the sum of its proper divisors (19289673169).

866942818031 is a wasteful number, since it uses less digits than its factorization.

866942818031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17585073.

The product of its (nonzero) digits is 3981312, while the sum is 56.

The spelling of 866942818031 in words is "eight hundred sixty-six billion, nine hundred forty-two million, eight hundred eighteen thousand, thirty-one".