669310212 has 96 divisors (see below), whose sum is σ = 1697439744. Its totient is φ = 204652800.

The previous prime is 669310163. The next prime is 669310217. The reversal of 669310212 is 212013966.

669310212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 669310212.

It is not an unprimeable number, because it can be changed into a prime (669310217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1171887 + ... + 1172457.

It is an arithmetic number, because the mean of its divisors is an integer number (17681664).

Almost surely, 2^669310212 is an apocalyptic number.

669310212 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669310212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (848719872).

669310212 is an abundant number, since it is smaller than the sum of its proper divisors (1028129532).

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

669310212 is a wasteful number, since it uses less digits than its factorization.

669310212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 669310212 is about 25871.0303621638. The cubic root of 669310212 is about 874.7336166525.

The spelling of 669310212 in words is "six hundred sixty-nine million, three hundred ten thousand, two hundred twelve".