66001300 has 18 divisors (see below), whose sum is σ = 143223038. Its totient is φ = 26400480.

The previous prime is 66001297. The next prime is 66001321. The reversal of 66001300 is 310066.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1552516 + 64448784 = 1246^2 + 8028^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 329907 + ... + 330106.

Almost surely, 2^66001300 is an apocalyptic number.

It is an amenable number.

66001300 is an abundant number, since it is smaller than the sum of its proper divisors (77221738).

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

66001300 is a wasteful number, since it uses less digits than its factorization.

66001300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660027 (or 660020 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 66001300 is about 8124.1184137111. The cubic root of 66001300 is about 404.1266553842.

Adding to 66001300 its reverse (310066), we get a palindrome (66311366).

The spelling of 66001300 in words is "sixty-six million, one thousand, three hundred".