66253765272 has 16 divisors (see below), whose sum is σ = 165634413240. Its totient is φ = 22084588416.

The previous prime is 66253765267. The next prime is 66253765289. The reversal of 66253765272 is 27256735266.

It is a super-2 number, since 2×66253765272² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1380286753 + ... + 1380286800.

Almost surely, 2^66253765272 is an apocalyptic number.

It is an amenable number.

66253765272 is an abundant number, since it is smaller than the sum of its proper divisors (99380647968).

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

66253765272 is a wasteful number, since it uses less digits than its factorization.

66253765272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2760573562 (or 2760573558 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 51.

The spelling of 66253765272 in words is "sixty-six billion, two hundred fifty-three million, seven hundred sixty-five thousand, two hundred seventy-two".