669853044 has 96 divisors (see below), whose sum is σ = 1995571200. Its totient is φ = 190343520.

The previous prime is 669853043. The next prime is 669853073. The reversal of 669853044 is 440358966.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669853043) 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 31 ways as a sum of consecutive naturals, for example, 142077 + ... + 146715.

It is an arithmetic number, because the mean of its divisors is an integer number (20787200).

Almost surely, 2^669853044 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 669853044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (997785600).

669853044 is an abundant number, since it is smaller than the sum of its proper divisors (1325718156).

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

669853044 is a wasteful number, since it uses less digits than its factorization.

669853044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4850 (or 4842 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 669853044 is about 25881.5193526192. The cubic root of 669853044 is about 874.9700317355.

The spelling of 669853044 in words is "six hundred sixty-nine million, eight hundred fifty-three thousand, forty-four".