669950208 has 108 divisors (see below), whose sum is σ = 1939888860. Its totient is φ = 222363648.

The previous prime is 669950201. The next prime is 669950327. The reversal of 669950208 is 802059966.

It can be written as a sum of positive squares in 2 ways, for example, as 8020224 + 661929984 = 2832^2 + 25728^2 .

It is not an unprimeable number, because it can be changed into a prime (669950201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 720688 + ... + 721616.

Almost surely, 2^669950208 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 669950208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (969944430).

669950208 is an abundant number, since it is smaller than the sum of its proper divisors (1269938652).

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

669950208 is a wasteful number, since it uses less digits than its factorization.

669950208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264 (or 1247 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 669950208 is about 25883.3963768281. The cubic root of 669950208 is about 875.0123352819.

The spelling of 669950208 in words is "six hundred sixty-nine million, nine hundred fifty thousand, two hundred eight".