669718224 has 60 divisors (see below), whose sum is σ = 2142038496. Its totient is φ = 191347776.

The previous prime is 669718223. The next prime is 669718237. The reversal of 669718224 is 422817966.

It is a happy number.

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 669718224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669718223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 331194 + ... + 333209.

Almost surely, 2^669718224 is an apocalyptic number.

It is an amenable number.

669718224 is an abundant number, since it is smaller than the sum of its proper divisors (1472320272).

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

669718224 is a wasteful number, since it uses less digits than its factorization.

669718224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664424 (or 664415 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 669718224 is about 25878.9146603949. The cubic root of 669718224 is about 874.9113266331.

The spelling of 669718224 in words is "six hundred sixty-nine million, seven hundred eighteen thousand, two hundred twenty-four".