1866660106 has 16 divisors (see below), whose sum is σ = 2857680000. Its totient is φ = 914160208.

The previous prime is 1866660091. The next prime is 1866660119. The reversal of 1866660106 is 6010666681.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48795 + ... + 78193.

It is an arithmetic number, because the mean of its divisors is an integer number (178605000).

Almost surely, 2^1866660106 is an apocalyptic number.

1866660106 is a deficient number, since it is larger than the sum of its proper divisors (991019894).

1866660106 is a wasteful number, since it uses less digits than its factorization.

1866660106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30053.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 1866660106 is about 43204.8620643557. The cubic root of 1866660106 is about 1231.2750577978.

The spelling of 1866660106 in words is "one billion, eight hundred sixty-six million, six hundred sixty thousand, one hundred six".