66643302 has 16 divisors (see below), whose sum is σ = 145403712. Its totient is φ = 20194920.

The previous prime is 66643277. The next prime is 66643303. The reversal of 66643302 is 20334666.

It is a self number, because there is not a number n which added to its sum of digits gives 66643302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66643303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504808 + ... + 504939.

It is an arithmetic number, because the mean of its divisors is an integer number (9087732).

Almost surely, 2^66643302 is an apocalyptic number.

66643302 is an abundant number, since it is smaller than the sum of its proper divisors (78760410).

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

66643302 is a wasteful number, since it uses less digits than its factorization.

66643302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009763.

The product of its (nonzero) digits is 15552, while the sum is 30.

The square root of 66643302 is about 8163.5348961097. The cubic root of 66643302 is about 405.4327579625.

Adding to 66643302 its reverse (20334666), we get a palindrome (86977968).

The spelling of 66643302 in words is "sixty-six million, six hundred forty-three thousand, three hundred two".