666611116 has 24 divisors (see below), whose sum is σ = 1219325184. Its totient is φ = 318281040.

The previous prime is 666611059. The next prime is 666611131. The reversal of 666611116 is 611116666.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52311 + ... + 63793.

It is an arithmetic number, because the mean of its divisors is an integer number (50805216).

Almost surely, 2^666611116 is an apocalyptic number.

It is an amenable number.

666611116 is a deficient number, since it is larger than the sum of its proper divisors (552714068).

666611116 is a wasteful number, since it uses less digits than its factorization.

666611116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12141 (or 12139 counting only the distinct ones).

The product of its digits is 7776, while the sum is 34.

The square root of 666611116 is about 25818.8132182717. The cubic root of 666611116 is about 873.5562000737.

The spelling of 666611116 in words is "six hundred sixty-six million, six hundred eleven thousand, one hundred sixteen".