66656353 has 2 divisors, whose sum is σ = 66656354. Its totient is φ = 66656352.

The previous prime is 66656299. The next prime is 66656393. The reversal of 66656353 is 35365666.

66656353 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (66656393) can be obtained adding 66656353 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38651089 + 28005264 = 6217^2 + 5292^2 .

It is a cyclic number.

It is not a de Polignac number, because 66656353 - 2¹³ = 66648161 is a prime.

It is not a weakly prime, because it can be changed into another prime (66656393) 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 as a sum of consecutive naturals, namely, 33328176 + 33328177.

It is an arithmetic number, because the mean of its divisors is an integer number (33328177).

Almost surely, 2^66656353 is an apocalyptic number.

It is an amenable number.

66656353 is a deficient number, since it is larger than the sum of its proper divisors (1).

66656353 is an equidigital number, since it uses as much as digits as its factorization.

66656353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 40.

The square root of 66656353 is about 8164.3342043304. The cubic root of 66656353 is about 405.4592220252.

The spelling of 66656353 in words is "sixty-six million, six hundred fifty-six thousand, three hundred fifty-three".