116821666 has 16 divisors (see below), whose sum is σ = 189116928. Its totient is φ = 53802000.

The previous prime is 116821651. The next prime is 116821687. The reversal of 116821666 is 666128611.

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, 8191 + ... + 17341.

It is an arithmetic number, because the mean of its divisors is an integer number (11819808).

Almost surely, 2^116821666 is an apocalyptic number.

116821666 is a deficient number, since it is larger than the sum of its proper divisors (72295262).

116821666 is a wasteful number, since it uses less digits than its factorization.

116821666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9657.

The product of its digits is 20736, while the sum is 37.

The square root of 116821666 is about 10808.4071907011. The cubic root of 116821666 is about 488.8487006183.

The spelling of 116821666 in words is "one hundred sixteen million, eight hundred twenty-one thousand, six hundred sixty-six".