1666744200 has 144 divisors (see below), whose sum is σ = 6106417200. Its totient is φ = 404054400.

The previous prime is 1666744169. The next prime is 1666744229. The reversal of 1666744200 is 24476661.

1666744200 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 22290 + ... + 61889.

It is an arithmetic number, because the mean of its divisors is an integer number (42405675).

Almost surely, 2^1666744200 is an apocalyptic number.

1666744200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666744200 is an abundant number, since it is smaller than the sum of its proper divisors (4439673000).

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

1666744200 is a wasteful number, since it uses less digits than its factorization.

1666744200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84212 (or 84200 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 1666744200 is about 40825.7786208665. The cubic root of 1666744200 is about 1185.6494863979.

The spelling of 1666744200 in words is "one billion, six hundred sixty-six million, seven hundred forty-four thousand, two hundred".