669607252 has 12 divisors (see below), whose sum is σ = 1174612320. Its totient is φ = 334003736.

The previous prime is 669607243. The next prime is 669607273. The reversal of 669607252 is 252706966.

It is a junction number, because it is equal to n+sod(n) for n = 669607199 and 669607208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198088 + ... + 201439.

It is an arithmetic number, because the mean of its divisors is an integer number (97884360).

Almost surely, 2^669607252 is an apocalyptic number.

It is an amenable number.

669607252 is a deficient number, since it is larger than the sum of its proper divisors (505005068).

669607252 is a wasteful number, since it uses less digits than its factorization.

669607252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399950 (or 399948 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 669607252 is about 25876.7705094743. The cubic root of 669607252 is about 874.8629998297.

The spelling of 669607252 in words is "six hundred sixty-nine million, six hundred seven thousand, two hundred fifty-two".