666441126 has 48 divisors (see below), whose sum is σ = 1560262704. Its totient is φ = 204368832.

The previous prime is 666441109. The next prime is 666441137. The reversal of 666441126 is 621144666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67200 + ... + 76476.

It is an arithmetic number, because the mean of its divisors is an integer number (32505473).

Almost surely, 2^666441126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666441126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (780131352).

666441126 is an abundant number, since it is smaller than the sum of its proper divisors (893821578).

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

666441126 is a wasteful number, since it uses less digits than its factorization.

666441126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9605 (or 9602 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 666441126 is about 25815.5210290244. The cubic root of 666441126 is about 873.4819396646.

The spelling of 666441126 in words is "six hundred sixty-six million, four hundred forty-one thousand, one hundred twenty-six".