866112890 has 16 divisors (see below), whose sum is σ = 1560632832. Its totient is φ = 346083024.

The previous prime is 866112881. The next prime is 866112893. The reversal of 866112890 is 98211668.

It is not an unprimeable number, because it can be changed into a prime (866112893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35114 + ... + 54453.

It is an arithmetic number, because the mean of its divisors is an integer number (97539552).

Almost surely, 2^866112890 is an apocalyptic number.

866112890 is a deficient number, since it is larger than the sum of its proper divisors (694519942).

866112890 is a wasteful number, since it uses less digits than its factorization.

866112890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90541.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 866112890 is about 29429.7959557996. The cubic root of 866112890 is about 953.2163889294.

The spelling of 866112890 in words is "eight hundred sixty-six million, one hundred twelve thousand, eight hundred ninety".