669952 has 18 divisors (see below), whose sum is σ = 1337798. Its totient is φ = 334848.

The previous prime is 669947. The next prime is 669971. The reversal of 669952 is 259966.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 665856 + 4096 = 816^2 + 64^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053 + ... + 1564.

2⁶⁶⁹⁹⁵² is an apocalyptic number.

It is an amenable number.

669952 is a deficient number, since it is larger than the sum of its proper divisors (667846).

669952 is an equidigital number, since it uses as much as digits as its factorization.

669952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633 (or 2619 counting only the distinct ones).

The product of its digits is 29160, while the sum is 37.

The square root of 669952 is about 818.5059559954. The cubic root of 669952 is about 87.5013115450.

The spelling of 669952 in words is "six hundred sixty-nine thousand, nine hundred fifty-two".