1866660124 has 12 divisors (see below), whose sum is σ = 3733320304. Its totient is φ = 799997184.

The previous prime is 1866660119. The next prime is 1866660137. The reversal of 1866660124 is 4210666681.

It is a happy number.

1866660124 is an admirable number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 33333189 + ... + 33333244.

Almost surely, 2^1866660124 is an apocalyptic number.

1866660124 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1866660124 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1866660124 is a wasteful number, since it uses less digits than its factorization.

1866660124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66666444 (or 66666442 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 1866660124 is about 43204.8622726656. The cubic root of 1866660124 is about 1231.2750617555.

The spelling of 1866660124 in words is "one billion, eight hundred sixty-six million, six hundred sixty thousand, one hundred twenty-four".