1669623868 has 24 divisors (see below), whose sum is σ = 3189002544. Its totient is φ = 758553600.

The previous prime is 1669623847. The next prime is 1669623881. The reversal of 1669623868 is 8683269661.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96796 + ... + 112732.

It is an arithmetic number, because the mean of its divisors is an integer number (132875106).

Almost surely, 2^1669623868 is an apocalyptic number.

It is an amenable number.

1669623868 is a deficient number, since it is larger than the sum of its proper divisors (1519378676).

1669623868 is a wasteful number, since it uses less digits than its factorization.

1669623868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18333 (or 18331 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 55.

The square root of 1669623868 is about 40861.0311666262. The cubic root of 1669623868 is about 1186.3319171442.

The spelling of 1669623868 in words is "one billion, six hundred sixty-nine million, six hundred twenty-three thousand, eight hundred sixty-eight".