1668022900 has 36 divisors (see below), whose sum is σ = 3717445228. Its totient is φ = 649175040.

The previous prime is 1668022883. The next prime is 1668022927. The reversal of 1668022900 is 92208661.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 305970064 + 1362052836 = 17492^2 + 36906^2 .

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 11 ways as a sum of consecutive naturals, for example, 221709 + ... + 229108.

Almost surely, 2^1668022900 is an apocalyptic number.

1668022900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1668022900 is an abundant number, since it is smaller than the sum of its proper divisors (2049422328).

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

1668022900 is a wasteful number, since it uses less digits than its factorization.

1668022900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450868 (or 450861 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1668022900 is about 40841.4360668182. The cubic root of 1668022900 is about 1185.9526127878.

The spelling of 1668022900 in words is "one billion, six hundred sixty-eight million, twenty-two thousand, nine hundred".