1666004112 has 160 divisors (see below), whose sum is σ = 4948968960. Its totient is φ = 542982528.

The previous prime is 1666004107. The next prime is 1666004141. The reversal of 1666004112 is 2114006661.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 31 ways as a sum of consecutive naturals, for example, 1644118 + ... + 1645130.

It is an arithmetic number, because the mean of its divisors is an integer number (30931056).

Almost surely, 2^1666004112 is an apocalyptic number.

1666004112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666004112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2474484480).

1666004112 is an abundant number, since it is smaller than the sum of its proper divisors (3282964848).

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

1666004112 is an equidigital number, since it uses as much as digits as its factorization.

1666004112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089 (or 1065 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1666004112 is about 40816.7136354705. The cubic root of 1666004112 is about 1185.4739715896.

The spelling of 1666004112 in words is "one billion, six hundred sixty-six million, four thousand, one hundred twelve".