669123952 has 40 divisors (see below), whose sum is σ = 1491107936. Its totient is φ = 284933376.

The previous prime is 669123943. The next prime is 669123953. The reversal of 669123952 is 259321966.

It is a junction number, because it is equal to n+sod(n) for n = 669123899 and 669123908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669123953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1443 + ... + 36610.

Almost surely, 2^669123952 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 669123952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (745553968).

669123952 is an abundant number, since it is smaller than the sum of its proper divisors (821983984).

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

669123952 is a wasteful number, since it uses less digits than its factorization.

669123952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38225 (or 38219 counting only the distinct ones).

The product of its digits is 174960, while the sum is 43.

The square root of 669123952 is about 25867.4303323697. The cubic root of 669123952 is about 874.6524669373.

The spelling of 669123952 in words is "six hundred sixty-nine million, one hundred twenty-three thousand, nine hundred fifty-two".