981686366 has 16 divisors (see below), whose sum is σ = 1539019440. Its totient is φ = 469029120.

The previous prime is 981686341. The next prime is 981686371. The reversal of 981686366 is 663686189.

981686366 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 81620 + ... + 92871.

It is an arithmetic number, because the mean of its divisors is an integer number (96188715).

Almost surely, 2^981686366 is an apocalyptic number.

981686366 is a deficient number, since it is larger than the sum of its proper divisors (557333074).

981686366 is a wasteful number, since it uses less digits than its factorization.

981686366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174619.

The product of its digits is 2239488, while the sum is 53.

The square root of 981686366 is about 31331.8746007959. The cubic root of 981686366 is about 993.8578060278.

The spelling of 981686366 in words is "nine hundred eighty-one million, six hundred eighty-six thousand, three hundred sixty-six".