866456994 has 16 divisors (see below), whose sum is σ = 1866215232. Its totient is φ = 266602128.

The previous prime is 866456953. The next prime is 866456999. The reversal of 866456994 is 499654668.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (866456999) 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, 5554134 + ... + 5554289.

It is an arithmetic number, because the mean of its divisors is an integer number (116638452).

Almost surely, 2^866456994 is an apocalyptic number.

866456994 is an abundant number, since it is smaller than the sum of its proper divisors (999758238).

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

866456994 is a wasteful number, since it uses less digits than its factorization.

866456994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11108441.

The product of its digits is 11197440, while the sum is 57.

The square root of 866456994 is about 29435.6415591711. The cubic root of 866456994 is about 953.3426088665.

It can be divided in two parts, 86645 and 6994, that added together give a palindrome (93639).

The spelling of 866456994 in words is "eight hundred sixty-six million, four hundred fifty-six thousand, nine hundred ninety-four".