3870185666 has 16 divisors (see below), whose sum is σ = 6140669184. Its totient is φ = 1825601184.

The previous prime is 3870185659. The next prime is 3870185701. The reversal of 3870185666 is 6665810783.

It is a happy number.

3870185666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 572906 + ... + 579621.

It is an arithmetic number, because the mean of its divisors is an integer number (383791824).

Almost surely, 2^3870185666 is an apocalyptic number.

3870185666 is a deficient number, since it is larger than the sum of its proper divisors (2270483518).

3870185666 is a wasteful number, since it uses less digits than its factorization.

3870185666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152625.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 3870185666 is about 62210.8163103491. The cubic root of 3870185666 is about 1570.0395768081.

The spelling of 3870185666 in words is "three billion, eight hundred seventy million, one hundred eighty-five thousand, six hundred sixty-six".