1666027836 has 36 divisors (see below), whose sum is σ = 4594199064. Its totient is φ = 504856800.

The previous prime is 1666027799. The next prime is 1666027843. The reversal of 1666027836 is 6387206661.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 1666027791 and 1666027800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2103175 + ... + 2103966.

Almost surely, 2^1666027836 is an apocalyptic number.

It is an amenable number.

1666027836 is an abundant number, since it is smaller than the sum of its proper divisors (2928171228).

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

1666027836 is a wasteful number, since it uses less digits than its factorization.

1666027836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4207162 (or 4207157 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 1666027836 is about 40817.0042506796. The cubic root of 1666027836 is about 1185.4795986367.

The spelling of 1666027836 in words is "one billion, six hundred sixty-six million, twenty-seven thousand, eight hundred thirty-six".