669353059600 has 135 divisors (see below), whose sum is σ = 1698001954383. Its totient is φ = 253531768320.

The previous prime is 669353059567. The next prime is 669353059607. The reversal of 669353059600 is 6950353966.

It is a happy number.

The square root of 669353059600 is 818140.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 246520194064 + 422832865536 = 496508^2 + 650256^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669353059607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 310892124 + ... + 310894276.

Almost surely, 2^669353059600 is an apocalyptic number.

669353059600 is the 818140-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669353059600

669353059600 is an abundant number, since it is smaller than the sum of its proper divisors (1028648894783).

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

669353059600 is an equidigital number, since it uses as much as digits as its factorization.

669353059600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4362 (or 2179 counting only the distinct ones).

The product of its (nonzero) digits is 3936600, while the sum is 52.

The spelling of 669353059600 in words is "six hundred sixty-nine billion, three hundred fifty-three million, fifty-nine thousand, six hundred".