66655253 has 16 divisors (see below), whose sum is σ = 79608960. Its totient is φ = 54600000.

The previous prime is 66655247. The next prime is 66655261. The reversal of 66655253 is 35255666.

66655253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66655253 - 2⁶ = 66655189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66655213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18878 + ... + 22128.

It is an arithmetic number, because the mean of its divisors is an integer number (4975560).

Almost surely, 2^66655253 is an apocalyptic number.

It is an amenable number.

66655253 is a deficient number, since it is larger than the sum of its proper divisors (12953707).

66655253 is a wasteful number, since it uses less digits than its factorization.

66655253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3388.

The product of its digits is 162000, while the sum is 38.

The square root of 66655253 is about 8164.2668378734. The cubic root of 66655253 is about 405.4569916421.

The spelling of 66655253 in words is "sixty-six million, six hundred fifty-five thousand, two hundred fifty-three".