669951360 has 384 divisors, whose sum is σ = 2606385600. Its totient is φ = 157335552.

The previous prime is 669951299. The next prime is 669951361. The reversal of 669951360 is 63159966.

669951360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669951361) 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, 1722046 + ... + 1722434.

Almost surely, 2^669951360 is an apocalyptic number.

669951360 is a gapful number since it is divisible by the number (60) 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 669951360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1303192800).

669951360 is an abundant number, since it is smaller than the sum of its proper divisors (1936434240).

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

669951360 is a wasteful number, since it uses less digits than its factorization.

669951360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450 (or 435 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The square root of 669951360 is about 25883.4186304669. The cubic root of 669951360 is about 875.0128368185.

The spelling of 669951360 in words is "six hundred sixty-nine million, nine hundred fifty-one thousand, three hundred sixty".