669427188 has 24 divisors (see below), whose sum is σ = 1563383808. Its totient is φ = 222944256.

The previous prime is 669427183. The next prime is 669427201. The reversal of 669427188 is 881724966.

It is a self number, because there is not a number n which added to its sum of digits gives 669427188.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669427183) 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, 10356 + ... + 38027.

It is an arithmetic number, because the mean of its divisors is an integer number (65140992).

Almost surely, 2^669427188 is an apocalyptic number.

It is an amenable number.

669427188 is an abundant number, since it is smaller than the sum of its proper divisors (893956620).

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

669427188 is a wasteful number, since it uses less digits than its factorization.

669427188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49543 (or 49541 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 51.

The square root of 669427188 is about 25873.2910160265. The cubic root of 669427188 is about 874.7845730338.

The spelling of 669427188 in words is "six hundred sixty-nine million, four hundred twenty-seven thousand, one hundred eighty-eight".