669573632 has 120 divisors (see below), whose sum is σ = 1676791116. Its totient is φ = 264757248.

The previous prime is 669573617. The next prime is 669573649. The reversal of 669573632 is 236375966.

It can be written as a sum of positive squares in 2 ways, for example, as 646379776 + 23193856 = 25424^2 + 4816^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 325118 + ... + 327170.

Almost surely, 2^669573632 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 669573632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (838395558).

669573632 is an abundant number, since it is smaller than the sum of its proper divisors (1007217484).

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

669573632 is a wasteful number, since it uses less digits than its factorization.

669573632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2098 (or 2075 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 47.

The square root of 669573632 is about 25876.1208839347. The cubic root of 669573632 is about 874.8483577211.

The spelling of 669573632 in words is "six hundred sixty-nine million, five hundred seventy-three thousand, six hundred thirty-two".