1866365044 has 12 divisors (see below), whose sum is σ = 3371498368. Its totient is φ = 903079800.

The previous prime is 1866365023. The next prime is 1866365131. The reversal of 1866365044 is 4405636681.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7525542 + ... + 7525789.

Almost surely, 2^1866365044 is an apocalyptic number.

It is an amenable number.

1866365044 is a deficient number, since it is larger than the sum of its proper divisors (1505133324).

1866365044 is a wasteful number, since it uses less digits than its factorization.

1866365044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15051366 (or 15051364 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 43.

The square root of 1866365044 is about 43201.4472442764. The cubic root of 1866365044 is about 1231.2101787082.

The spelling of 1866365044 in words is "one billion, eight hundred sixty-six million, three hundred sixty-five thousand, forty-four".