669378396 has 24 divisors (see below), whose sum is σ = 1604097040. Its totient is φ = 217095552.

The previous prime is 669378373. The next prime is 669378403. The reversal of 669378396 is 693873966.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 753361 + ... + 754248.

Almost surely, 2^669378396 is an apocalyptic number.

It is an amenable number.

669378396 is an abundant number, since it is smaller than the sum of its proper divisors (934718644).

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

669378396 is a wasteful number, since it uses less digits than its factorization.

669378396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507653 (or 1507651 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 57.

The square root of 669378396 is about 25872.3480959885. The cubic root of 669378396 is about 874.7633192780.

The spelling of 669378396 in words is "six hundred sixty-nine million, three hundred seventy-eight thousand, three hundred ninety-six".