669596544 has 320 divisors, whose sum is σ = 2199344400. Its totient is φ = 201277440.

The previous prime is 669596519. The next prime is 669596549. The reversal of 669596544 is 445695966.

669596544 is a `hidden beast` number, since 6 + 6 + 9 + 5 + 96 + 544 = 666.

669596544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669596549) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5111359 + ... + 5111489.

Almost surely, 2^669596544 is an apocalyptic number.

669596544 is a gapful number since it is divisible by the number (64) 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 669596544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1099672200).

669596544 is an abundant number, since it is smaller than the sum of its proper divisors (1529747856).

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

669596544 is a wasteful number, since it uses less digits than its factorization.

669596544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 182 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 54.

The square root of 669596544 is about 25876.5636049302. The cubic root of 669596544 is about 874.8583363582.

The spelling of 669596544 in words is "six hundred sixty-nine million, five hundred ninety-six thousand, five hundred forty-four".