1666140164 has 48 divisors (see below), whose sum is σ = 3195203760. Its totient is φ = 755589120.

The previous prime is 1666140149. The next prime is 1666140169. The reversal of 1666140164 is 4610416661.

It can be written as a sum of positive squares in 8 ways, for example, as 54760000 + 1611380164 = 7400^2 + 40142^2 .

It is not an unprimeable number, because it can be changed into a prime (1666140169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 799604 + ... + 801684.

It is an arithmetic number, because the mean of its divisors is an integer number (66566745).

Almost surely, 2^1666140164 is an apocalyptic number.

It is an amenable number.

1666140164 is a deficient number, since it is larger than the sum of its proper divisors (1529063596).

1666140164 is a wasteful number, since it uses less digits than its factorization.

1666140164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360 (or 2358 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 1666140164 is about 40818.3802226399. The cubic root of 1666140164 is about 1185.5062407605.

The spelling of 1666140164 in words is "one billion, six hundred sixty-six million, one hundred forty thousand, one hundred sixty-four".