666087576 has 288 divisors, whose sum is σ = 2212439040. Its totient is φ = 166320000.

The previous prime is 666087571. The next prime is 666087629. The reversal of 666087576 is 675780666.

It is a happy number.

666087576 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 not an unprimeable number, because it can be changed into a prime (666087571) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4411101 + ... + 4411251.

It is an arithmetic number, because the mean of its divisors is an integer number (7682080).

Almost surely, 2^666087576 is an apocalyptic number.

666087576 is a gapful number since it is divisible by the number (66) 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 666087576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1106219520).

666087576 is an abundant number, since it is smaller than the sum of its proper divisors (1546351464).

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

666087576 is a wasteful number, since it uses less digits than its factorization.

666087576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 51.

The square root of 666087576 is about 25808.6724958879. The cubic root of 666087576 is about 873.3274503162.

The spelling of 666087576 in words is "six hundred sixty-six million, eighty-seven thousand, five hundred seventy-six".