1666878112 has 24 divisors (see below), whose sum is σ = 3282576192. Its totient is φ = 833208000.

The previous prime is 1666878107. The next prime is 1666878163. The reversal of 1666878112 is 2118786661.

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 3 ways as a sum of consecutive naturals, for example, 219987 + ... + 227437.

It is an arithmetic number, because the mean of its divisors is an integer number (136774008).

Almost surely, 2^1666878112 is an apocalyptic number.

It is an amenable number.

1666878112 is a deficient number, since it is larger than the sum of its proper divisors (1615698080).

1666878112 is an equidigital number, since it uses as much as digits as its factorization.

1666878112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14452 (or 14444 counting only the distinct ones).

The product of its digits is 193536, while the sum is 46.

The square root of 1666878112 is about 40827.4186301314. The cubic root of 1666878112 is about 1185.6812386092.

The spelling of 1666878112 in words is "one billion, six hundred sixty-six million, eight hundred seventy-eight thousand, one hundred twelve".