669677312 has 36 divisors (see below), whose sum is σ = 1353700320. Its totient is φ = 330590208.

The previous prime is 669677303. The next prime is 669677321. The reversal of 669677312 is 213776966.

It is a happy number.

669677312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (669677303) and next prime (669677321).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3668 + ... + 36780.

Almost surely, 2^669677312 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 669677312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (676850160).

669677312 is an abundant number, since it is smaller than the sum of its proper divisors (684023008).

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

669677312 is an equidigital number, since it uses as much as digits as its factorization.

669677312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33208 (or 33194 counting only the distinct ones).

The product of its digits is 571536, while the sum is 47.

The square root of 669677312 is about 25878.1241978626. The cubic root of 669677312 is about 874.8935106324.

The spelling of 669677312 in words is "six hundred sixty-nine million, six hundred seventy-seven thousand, three hundred twelve".