666126460 has 96 divisors (see below), whose sum is σ = 1503774720. Its totient is φ = 247306752.

The previous prime is 666126457. The next prime is 666126493. The reversal of 666126460 is 64621666.

666126460 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2787021 + ... + 2787259.

It is an arithmetic number, because the mean of its divisors is an integer number (15664320).

Almost surely, 2^666126460 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666126460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (751887360).

666126460 is an abundant number, since it is smaller than the sum of its proper divisors (837648260).

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

666126460 is a wasteful number, since it uses less digits than its factorization.

666126460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 666126460 is about 25809.4257975647. The cubic root of 666126460 is about 873.3444439794.

The spelling of 666126460 in words is "six hundred sixty-six million, one hundred twenty-six thousand, four hundred sixty".