1866676194 has 96 divisors (see below), whose sum is σ = 4379132160. Its totient is φ = 572544000.

The previous prime is 1866676187. The next prime is 1866676237. The reversal of 1866676194 is 4916766681.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1866676194.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3280342 + ... + 3280910.

It is an arithmetic number, because the mean of its divisors is an integer number (45615960).

Almost surely, 2^1866676194 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1866676194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2189566080).

1866676194 is an abundant number, since it is smaller than the sum of its proper divisors (2512455966).

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

1866676194 is a wasteful number, since it uses less digits than its factorization.

1866676194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816 (or 813 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 1866676194 is about 43205.0482467038. The cubic root of 1866676194 is about 1231.2785950774.

The spelling of 1866676194 in words is "one billion, eight hundred sixty-six million, six hundred seventy-six thousand, one hundred ninety-four".