1866423716 has 12 divisors (see below), whose sum is σ = 3270905820. Its totient is φ = 931879200.

The previous prime is 1866423709. The next prime is 1866423719. The reversal of 1866423716 is 6173246681.

It can be written as a sum of positive squares in 2 ways, for example, as 652598116 + 1213825600 = 25546^2 + 34840^2 .

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1866423719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330011 + ... + 335618.

It is an arithmetic number, because the mean of its divisors is an integer number (272575485).

Almost surely, 2^1866423716 is an apocalyptic number.

It is an amenable number.

1866423716 is a deficient number, since it is larger than the sum of its proper divisors (1404482104).

1866423716 is a wasteful number, since it uses less digits than its factorization.

1866423716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666334 (or 666332 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The square root of 1866423716 is about 43202.1262902649. The cubic root of 1866423716 is about 1231.2230802226.

The spelling of 1866423716 in words is "one billion, eight hundred sixty-six million, four hundred twenty-three thousand, seven hundred sixteen".