669837380 has 48 divisors (see below), whose sum is σ = 1429322160. Its totient is φ = 263651328.

The previous prime is 669837361. The next prime is 669837409. The reversal of 669837380 is 83738966.

669837380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1201216 + 668636164 = 1096^2 + 25858^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373526 + ... + 375314.

It is an arithmetic number, because the mean of its divisors is an integer number (29777545).

Almost surely, 2^669837380 is an apocalyptic number.

It is an amenable number.

669837380 is an abundant number, since it is smaller than the sum of its proper divisors (759484780).

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

669837380 is a wasteful number, since it uses less digits than its factorization.

669837380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088 (or 2086 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 669837380 is about 25881.2167411040. The cubic root of 669837380 is about 874.9632115145.

The spelling of 669837380 in words is "six hundred sixty-nine million, eight hundred thirty-seven thousand, three hundred eighty".