669621352 has 16 divisors (see below), whose sum is σ = 1255897440. Its totient is φ = 334715376.

The previous prime is 669621331. The next prime is 669621353. The reversal of 669621352 is 253126966.

It is not an unprimeable number, because it can be changed into a prime (669621353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24493 + ... + 44035.

It is an arithmetic number, because the mean of its divisors is an integer number (78493590).

Almost surely, 2^669621352 is an apocalyptic number.

It is an amenable number.

669621352 is a deficient number, since it is larger than the sum of its proper divisors (586276088).

669621352 is a wasteful number, since it uses less digits than its factorization.

669621352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23832 (or 23828 counting only the distinct ones).

The product of its digits is 116640, while the sum is 40.

The square root of 669621352 is about 25877.0429531660. The cubic root of 669621352 is about 874.8691404849.

The spelling of 669621352 in words is "six hundred sixty-nine million, six hundred twenty-one thousand, three hundred fifty-two".