666111050 has 72 divisors (see below), whose sum is σ = 1421346528. Its totient is φ = 231642400.

The previous prime is 666111011. The next prime is 666111067. The reversal of 666111050 is 50111666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 136757 + ... + 141543.

It is an arithmetic number, because the mean of its divisors is an integer number (19740924).

Almost surely, 2^666111050 is an apocalyptic number.

666111050 is an abundant number, since it is smaller than the sum of its proper divisors (755235478).

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

666111050 is a wasteful number, since it uses less digits than its factorization.

666111050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4844 (or 4828 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 666111050 is about 25809.1272614941. The cubic root of 666111050 is about 873.3377093514.

It can be divided in two parts, 66 and 6111050, that added together give a palindrome (6111116).

The spelling of 666111050 in words is "six hundred sixty-six million, one hundred eleven thousand, fifty".