669627306 has 12 divisors (see below), whose sum is σ = 1450859202. Its totient is φ = 223209096.

The previous prime is 669627271. The next prime is 669627319. The reversal of 669627306 is 603726966.

It can be written as a sum of positive squares in only one way, i.e., 627051681 + 42575625 = 25041^2 + 6525^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18600741 + ... + 18600776.

Almost surely, 2^669627306 is an apocalyptic number.

669627306 is an abundant number, since it is smaller than the sum of its proper divisors (781231896).

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

669627306 is a wasteful number, since it uses less digits than its factorization.

669627306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37201525 (or 37201522 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 45.

The square root of 669627306 is about 25877.1579969671. The cubic root of 669627306 is about 874.8717334704.

The spelling of 669627306 in words is "six hundred sixty-nine million, six hundred twenty-seven thousand, three hundred six".