669478360 has 64 divisors (see below), whose sum is σ = 1598940000. Its totient is φ = 251406336.

The previous prime is 669478321. The next prime is 669478361. The reversal of 669478360 is 63874966.

669478360 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669478361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 338334 + ... + 340306.

Almost surely, 2^669478360 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 669478360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (799470000).

669478360 is an abundant number, since it is smaller than the sum of its proper divisors (929461640).

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

669478360 is a wasteful number, since it uses less digits than its factorization.

669478360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500 (or 2496 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 49.

The square root of 669478360 is about 25874.2798933613. The cubic root of 669478360 is about 874.8068624061.

The spelling of 669478360 in words is "six hundred sixty-nine million, four hundred seventy-eight thousand, three hundred sixty".