66253273 has 8 divisors (see below), whose sum is σ = 68721480. Its totient is φ = 63820800.

The previous prime is 66253249. The next prime is 66253279. The reversal of 66253273 is 37235266.

It can be written as a sum of positive squares in 4 ways, for example, as 46963609 + 19289664 = 6853^2 + 4392^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66253273 - 2⁵ = 66253241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66253279) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5128 + ... + 12601.

It is an arithmetic number, because the mean of its divisors is an integer number (8590185).

Almost surely, 2^66253273 is an apocalyptic number.

It is an amenable number.

66253273 is a deficient number, since it is larger than the sum of its proper divisors (2468207).

66253273 is a wasteful number, since it uses less digits than its factorization.

66253273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17867.

The product of its digits is 45360, while the sum is 34.

The square root of 66253273 is about 8139.6113543584. The cubic root of 66253273 is about 404.6402800945.

It can be divided in two parts, 662 and 53273, that added together give a palindrome (53935).

The spelling of 66253273 in words is "sixty-six million, two hundred fifty-three thousand, two hundred seventy-three".