669863330 has 32 divisors (see below), whose sum is σ = 1252138608. Its totient is φ = 257817600.

The previous prime is 669863329. The next prime is 669863347. The reversal of 669863330 is 33368966.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 164378041 + 505485289 = 12821^2 + 22483^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18740 + ... + 41120.

Almost surely, 2^669863330 is an apocalyptic number.

669863330 is a deficient number, since it is larger than the sum of its proper divisors (582275278).

669863330 is a wasteful number, since it uses less digits than its factorization.

669863330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22502.

The product of its (nonzero) digits is 419904, while the sum is 44.

The square root of 669863330 is about 25881.7180650744. The cubic root of 669863330 is about 874.9745102779.

The spelling of 669863330 in words is "six hundred sixty-nine million, eight hundred sixty-three thousand, three hundred thirty".