1866055164 has 48 divisors (see below), whose sum is σ = 4441530240. Its totient is φ = 609560640.

The previous prime is 1866055091. The next prime is 1866055183. The reversal of 1866055164 is 4615506681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 926919 + ... + 928929.

It is an arithmetic number, because the mean of its divisors is an integer number (92531880).

Almost surely, 2^1866055164 is an apocalyptic number.

It is an amenable number.

1866055164 is an abundant number, since it is smaller than the sum of its proper divisors (2575475076).

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

1866055164 is a wasteful number, since it uses less digits than its factorization.

1866055164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3530 (or 3528 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 1866055164 is about 43197.8606414716. The cubic root of 1866055164 is about 1231.1420340314.

The spelling of 1866055164 in words is "one billion, eight hundred sixty-six million, fifty-five thousand, one hundred sixty-four".