669140325 has 72 divisors (see below), whose sum is σ = 1429997760. Its totient is φ = 305877600.

The previous prime is 669140237. The next prime is 669140327. The reversal of 669140325 is 523041966.

It is a happy number.

669140325 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 669140325 - 2¹² = 669136229 is a prime.

It is a super-2 number, since 2×669140325² = 895497549082211250, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 669140325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669140327) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 22960 + ... + 43190.

It is an arithmetic number, because the mean of its divisors is an integer number (19861080).

Almost surely, 2^669140325 is an apocalyptic number.

It is an amenable number.

669140325 is an abundant number, since it is smaller than the sum of its proper divisors (760857435).

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

669140325 is a wasteful number, since it uses less digits than its factorization.

669140325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20264 (or 20246 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 669140325 is about 25867.7468094923. The cubic root of 669140325 is about 874.6596009259.

The spelling of 669140325 in words is "six hundred sixty-nine million, one hundred forty thousand, three hundred twenty-five".