666227166 has 16 divisors (see below), whose sum is σ = 1453586688. Its totient is φ = 201887000.

The previous prime is 666227123. The next prime is 666227167. The reversal of 666227166 is 661722666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666227167) by changing a digit.

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, 5047110 + ... + 5047241.

It is an arithmetic number, because the mean of its divisors is an integer number (90849168).

Almost surely, 2^666227166 is an apocalyptic number.

666227166 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

666227166 is an abundant number, since it is smaller than the sum of its proper divisors (787359522).

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

666227166 is a wasteful number, since it uses less digits than its factorization.

666227166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10094367.

The product of its digits is 217728, while the sum is 42.

The square root of 666227166 is about 25811.3766777365. The cubic root of 666227166 is about 873.3884529371.

The spelling of 666227166 in words is "six hundred sixty-six million, two hundred twenty-seven thousand, one hundred sixty-six".