669242450 has 24 divisors (see below), whose sum is σ = 1262329920. Its totient is φ = 263925200.

The previous prime is 669242449. The next prime is 669242489. The reversal of 669242450 is 54242966.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90710 + ... + 97809.

It is an arithmetic number, because the mean of its divisors is an integer number (52597080).

Almost surely, 2^669242450 is an apocalyptic number.

669242450 is a deficient number, since it is larger than the sum of its proper divisors (593087470).

669242450 is a wasteful number, since it uses less digits than its factorization.

669242450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188602 (or 188597 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 669242450 is about 25869.7207174720. The cubic root of 669242450 is about 874.7040958619.

The spelling of 669242450 in words is "six hundred sixty-nine million, two hundred forty-two thousand, four hundred fifty".