1666169484 has 24 divisors (see below), whose sum is σ = 4443118848. Its totient is φ = 476048400.

The previous prime is 1666169471. The next prime is 1666169497. The reversal of 1666169484 is 4849616661.

It is an interprime number because it is at equal distance from previous prime (1666169471) and next prime (1666169497).

It is a super-2 number, since 2×1666169484² = 5552241498825652512, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9917592 + ... + 9917759.

It is an arithmetic number, because the mean of its divisors is an integer number (185129952).

Almost surely, 2^1666169484 is an apocalyptic number.

1666169484 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1666169484 is an abundant number, since it is smaller than the sum of its proper divisors (2776949364).

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

1666169484 is a wasteful number, since it uses less digits than its factorization.

1666169484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19835365 (or 19835363 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 51.

The square root of 1666169484 is about 40818.7393729890. The cubic root of 1666169484 is about 1185.5131947251.

The spelling of 1666169484 in words is "one billion, six hundred sixty-six million, one hundred sixty-nine thousand, four hundred eighty-four".