866890405023 has 16 divisors (see below), whose sum is σ = 1196094396000. Its totient is φ = 557819458560.

The previous prime is 866890405001. The next prime is 866890405033. The reversal of 866890405023 is 320504098668.

It is not a de Polignac number, because 866890405023 - 2²¹ = 866888307871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866890405033) 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 15 ways as a sum of consecutive naturals, for example, 1324798 + ... + 1867851.

It is an arithmetic number, because the mean of its divisors is an integer number (74755899750).

Almost surely, 2^866890405023 is an apocalyptic number.

866890405023 is a deficient number, since it is larger than the sum of its proper divisors (329203990977).

866890405023 is a wasteful number, since it uses less digits than its factorization.

866890405023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3195802.

The product of its (nonzero) digits is 2488320, while the sum is 51.

The spelling of 866890405023 in words is "eight hundred sixty-six billion, eight hundred ninety million, four hundred five thousand, twenty-three".