1866638022 has 16 divisors (see below), whose sum is σ = 3733707312. Its totient is φ = 622140800.

The previous prime is 1866637987. The next prime is 1866638051. The reversal of 1866638022 is 2208366681.

It is a congruent number.

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, 76522 + ... + 97922.

It is an arithmetic number, because the mean of its divisors is an integer number (233356707).

Almost surely, 2^1866638022 is an apocalyptic number.

1866638022 is an abundant number, since it is smaller than the sum of its proper divisors (1867069290).

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

1866638022 is a wasteful number, since it uses less digits than its factorization.

1866638022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35943.

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 1866638022 is about 43204.6064905121. The cubic root of 1866638022 is about 1231.2702021405.

The spelling of 1866638022 in words is "one billion, eight hundred sixty-six million, six hundred thirty-eight thousand, twenty-two".