669389112 has 96 divisors (see below), whose sum is σ = 2105981280. Its totient is φ = 188110080.

The previous prime is 669389101. The next prime is 669389131. The reversal of 669389112 is 211983966.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19858 + ... + 41630.

It is an arithmetic number, because the mean of its divisors is an integer number (21937305).

Almost surely, 2^669389112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669389112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1052990640).

669389112 is an abundant number, since it is smaller than the sum of its proper divisors (1436592168).

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

669389112 is a wasteful number, since it uses less digits than its factorization.

669389112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21853 (or 21846 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 669389112 is about 25872.5551888483. Note that the first 3 decimals coincide. The cubic root of 669389112 is about 874.7679872474.

The spelling of 669389112 in words is "six hundred sixty-nine million, three hundred eighty-nine thousand, one hundred twelve".