66000100 has 18 divisors (see below), whose sum is σ = 143220434. Its totient is φ = 26400000.

The previous prime is 66000083. The next prime is 66000149. The reversal of 66000100 is 100066.

It can be written as a sum of positive squares in 3 ways, for example, as 3526884 + 62473216 = 1878^2 + 7904^2 .

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, 329901 + ... + 330100.

Almost surely, 2^66000100 is an apocalyptic number.

It is an amenable number.

66000100 is an abundant number, since it is smaller than the sum of its proper divisors (77220334).

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

66000100 is a wasteful number, since it uses less digits than its factorization.

66000100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660015 (or 660008 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 66000100 is about 8124.0445592082. The cubic root of 66000100 is about 404.1242061651.

Adding to 66000100 its reverse (100066), we get a palindrome (66100166).

The spelling of 66000100 in words is "sixty-six million, one hundred", and thus it is an aban number.