66071300 has 36 divisors (see below), whose sum is σ = 143727780. Its totient is φ = 26363520.

The previous prime is 66071297. The next prime is 66071321. The reversal of 66071300 is 317066.

It can be written as a sum of positive squares in 6 ways, for example, as 817216 + 65254084 = 904^2 + 8078^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79286 + ... + 80114.

Almost surely, 2^66071300 is an apocalyptic number.

It is an amenable number.

66071300 is an abundant number, since it is smaller than the sum of its proper divisors (77656480).

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

66071300 is a wasteful number, since it uses less digits than its factorization.

66071300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640 (or 1633 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 66071300 is about 8128.4254317795. The cubic root of 66071300 is about 404.2694751511.

Adding to 66071300 its reverse (317066), we get a palindrome (66388366).

The spelling of 66071300 in words is "sixty-six million, seventy-one thousand, three hundred".