866477850123 has 16 divisors (see below), whose sum is σ = 1157199350400. Its totient is φ = 576704768640.

The previous prime is 866477850113. The next prime is 866477850191. The reversal of 866477850123 is 321058774668.

It is not a de Polignac number, because 866477850123 - 2¹² = 866477846027 is a prime.

It is a super-2 number, since 2×866477850123² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (866477850113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5407468 + ... + 5565398.

It is an arithmetic number, because the mean of its divisors is an integer number (72324959400).

Almost surely, 2^866477850123 is an apocalyptic number.

866477850123 is a deficient number, since it is larger than the sum of its proper divisors (290721500277).

866477850123 is a wasteful number, since it uses less digits than its factorization.

866477850123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160922.

The product of its (nonzero) digits is 13547520, while the sum is 57.

The spelling of 866477850123 in words is "eight hundred sixty-six billion, four hundred seventy-seven million, eight hundred fifty thousand, one hundred twenty-three".