669627340 has 12 divisors (see below), whose sum is σ = 1406217456. Its totient is φ = 267850928.

The previous prime is 669627337. The next prime is 669627353. The reversal of 669627340 is 43726966.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16740664 + ... + 16740703.

It is an arithmetic number, because the mean of its divisors is an integer number (117184788).

Almost surely, 2^669627340 is an apocalyptic number.

It is an amenable number.

669627340 is an abundant number, since it is smaller than the sum of its proper divisors (736590116).

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

669627340 is a wasteful number, since it uses less digits than its factorization.

669627340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33481376 (or 33481374 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 43.

The square root of 669627340 is about 25877.1586539172. The cubic root of 669627340 is about 874.8717482775.

The spelling of 669627340 in words is "six hundred sixty-nine million, six hundred twenty-seven thousand, three hundred forty".