666244500 has 192 divisors, whose sum is σ = 2071829760. Its totient is φ = 165888000.

The previous prime is 666244493. The next prime is 666244517. The reversal of 666244500 is 5442666.

666244500 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 63 ways as a sum of consecutive naturals, for example, 2764380 + ... + 2764620.

It is an arithmetic number, because the mean of its divisors is an integer number (10790780).

Almost surely, 2^666244500 is an apocalyptic number.

666244500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666244500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1035914880).

666244500 is an abundant number, since it is smaller than the sum of its proper divisors (1405585260).

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

666244500 is a wasteful number, since it uses less digits than its factorization.

666244500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 666244500 is about 25811.7124577197. The cubic root of 666244500 is about 873.3960275228.

The spelling of 666244500 in words is "six hundred sixty-six million, two hundred forty-four thousand, five hundred".