669356442 has 24 divisors (see below), whose sum is σ = 1513328544. Its totient is φ = 213417864.

The previous prime is 669356431. The next prime is 669356473. The reversal of 669356442 is 244653966.

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, 807988 + ... + 808815.

It is an arithmetic number, because the mean of its divisors is an integer number (63055356).

Almost surely, 2^669356442 is an apocalyptic number.

669356442 is an abundant number, since it is smaller than the sum of its proper divisors (843972102).

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

669356442 is a wasteful number, since it uses less digits than its factorization.

669356442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616834 (or 1616831 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The square root of 669356442 is about 25871.9238171420. The cubic root of 669356442 is about 874.7537557964.

The spelling of 669356442 in words is "six hundred sixty-nine million, three hundred fifty-six thousand, four hundred forty-two".