666892224 has 112 divisors (see below), whose sum is σ = 2008571040. Its totient is φ = 216852480.

The previous prime is 666892211. The next prime is 666892241. The reversal of 666892224 is 422298666.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 666892224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66142 + ... + 75554.

It is an arithmetic number, because the mean of its divisors is an integer number (17933670).

Almost surely, 2^666892224 is an apocalyptic number.

666892224 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666892224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1004285520).

666892224 is an abundant number, since it is smaller than the sum of its proper divisors (1341678816).

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

666892224 is a wasteful number, since it uses less digits than its factorization.

666892224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9475 (or 9459 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 666892224 is about 25824.2565043023. The cubic root of 666892224 is about 873.6789748673.

The spelling of 666892224 in words is "six hundred sixty-six million, eight hundred ninety-two thousand, two hundred twenty-four".