669700944 has 240 divisors, whose sum is σ = 2158790400. Its totient is φ = 191923200.

The previous prime is 669700943. The next prime is 669700981. The reversal of 669700944 is 449007966.

It is a super-2 number, since 2×669700944² = 896998708788982272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 669700944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669700943) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2801977 + ... + 2802215.

It is an arithmetic number, because the mean of its divisors is an integer number (8994960).

Almost surely, 2^669700944 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 669700944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1079395200).

669700944 is an abundant number, since it is smaller than the sum of its proper divisors (1489089456).

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

669700944 is a wasteful number, since it uses less digits than its factorization.

669700944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 669700944 is about 25878.5807957083. The cubic root of 669700944 is about 874.9038017780.

The spelling of 669700944 in words is "six hundred sixty-nine million, seven hundred thousand, nine hundred forty-four".