669339372 has 144 divisors (see below), whose sum is σ = 1844640000. Its totient is φ = 188068608.

The previous prime is 669339367. The next prime is 669339413. The reversal of 669339372 is 273933966.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1117129 + ... + 1117727.

It is an arithmetic number, because the mean of its divisors is an integer number (12810000).

Almost surely, 2^669339372 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 669339372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (922320000).

669339372 is an abundant number, since it is smaller than the sum of its proper divisors (1175300628).

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

669339372 is a wasteful number, since it uses less digits than its factorization.

669339372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680 (or 665 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 48.

The square root of 669339372 is about 25871.5939207464. The cubic root of 669339372 is about 874.7463197117.

The spelling of 669339372 in words is "six hundred sixty-nine million, three hundred thirty-nine thousand, three hundred seventy-two".