66013120 has 28 divisors (see below), whose sum is σ = 157194504. Its totient is φ = 26405120.

The previous prime is 66013117. The next prime is 66013121. The reversal of 66013120 is 2131066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66013121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102826 + ... + 103465.

Almost surely, 2^66013120 is an apocalyptic number.

It is an amenable number.

66013120 is an abundant number, since it is smaller than the sum of its proper divisors (91181384).

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

66013120 is a wasteful number, since it uses less digits than its factorization.

66013120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206308 (or 206298 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 66013120 is about 8124.8458446915. The cubic root of 66013120 is about 404.1507786057.

Adding to 66013120 its reverse (2131066), we get a palindrome (68144186).

The spelling of 66013120 in words is "sixty-six million, thirteen thousand, one hundred twenty".