666286632 has 192 divisors, whose sum is σ = 2084659200. Its totient is φ = 190270080.

The previous prime is 666286603. The next prime is 666286637. The reversal of 666286632 is 236682666.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (666286637) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1438833 + ... + 1439295.

It is an arithmetic number, because the mean of its divisors is an integer number (10857600).

Almost surely, 2^666286632 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 666286632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1042329600).

666286632 is an abundant number, since it is smaller than the sum of its proper divisors (1418372568).

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

666286632 is a wasteful number, since it uses less digits than its factorization.

666286632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588 (or 581 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 666286632 is about 25812.5285859406. The cubic root of 666286632 is about 873.4144377539.

The spelling of 666286632 in words is "six hundred sixty-six million, two hundred eighty-six thousand, six hundred thirty-two".