1666980875 has 16 divisors (see below), whose sum is σ = 2377592256. Its totient is φ = 1143072000.

The previous prime is 1666980841. The next prime is 1666980893. The reversal of 1666980875 is 5780896661.

It is a happy number.

1666980875 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1666980875 - 2²² = 1662786571 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1666980875.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 951686 + ... + 953435.

It is an arithmetic number, because the mean of its divisors is an integer number (148599516).

Almost surely, 2^1666980875 is an apocalyptic number.

1666980875 is a deficient number, since it is larger than the sum of its proper divisors (710611381).

1666980875 is an equidigital number, since it uses as much as digits as its factorization.

1666980875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905143 (or 1905133 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 56.

The square root of 1666980875 is about 40828.6771154785. The cubic root of 1666980875 is about 1185.7056038495.

The spelling of 1666980875 in words is "one billion, six hundred sixty-six million, nine hundred eighty thousand, eight hundred seventy-five".