1881196866 has 16 divisors (see below), whose sum is σ = 4180437600. Its totient is φ = 627065604.

The previous prime is 1881196847. The next prime is 1881196879. The reversal of 1881196866 is 6686911881.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 34836979 = 1881196866 / (1 + 8 + 8 + 1 + 1 + 9 + 6 + 8 + 6 + 6).

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, 17418436 + ... + 17418543.

It is an arithmetic number, because the mean of its divisors is an integer number (261277350).

Almost surely, 2^1881196866 is an apocalyptic number.

1881196866 is an abundant number, since it is smaller than the sum of its proper divisors (2299240734).

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

1881196866 is a wasteful number, since it uses less digits than its factorization.

1881196866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34836990 (or 34836984 counting only the distinct ones).

The product of its digits is 995328, while the sum is 54.

The square root of 1881196866 is about 43372.7664093495. The cubic root of 1881196866 is about 1234.4630131729.

The spelling of 1881196866 in words is "one billion, eight hundred eighty-one million, one hundred ninety-six thousand, eight hundred sixty-six".