669293628 has 24 divisors (see below), whose sum is σ = 1562177232. Its totient is φ = 223027584.

The previous prime is 669293623. The next prime is 669293663. The reversal of 669293628 is 826392966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669293623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43176 + ... + 56592.

It is an arithmetic number, because the mean of its divisors is an integer number (65090718).

Almost surely, 2^669293628 is an apocalyptic number.

It is an amenable number.

669293628 is an abundant number, since it is smaller than the sum of its proper divisors (892883604).

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

669293628 is a wasteful number, since it uses less digits than its factorization.

669293628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17581 (or 17579 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 51.

The square root of 669293628 is about 25870.7098472384. The cubic root of 669293628 is about 874.7263919497.

The spelling of 669293628 in words is "six hundred sixty-nine million, two hundred ninety-three thousand, six hundred twenty-eight".