66226553 has 2 divisors, whose sum is σ = 66226554. Its totient is φ = 66226552.

The previous prime is 66226529. The next prime is 66226583. The reversal of 66226553 is 35562266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60403984 + 5822569 = 7772^2 + 2413^2 .

It is a cyclic number.

It is not a de Polignac number, because 66226553 - 2¹⁰ = 66225529 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66226583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33113276 + 33113277.

It is an arithmetic number, because the mean of its divisors is an integer number (33113277).

Almost surely, 2^66226553 is an apocalyptic number.

It is an amenable number.

66226553 is a deficient number, since it is larger than the sum of its proper divisors (1).

66226553 is an equidigital number, since it uses as much as digits as its factorization.

66226553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 35.

The square root of 66226553 is about 8137.9698328269. The cubic root of 66226553 is about 404.5858755264.

The spelling of 66226553 in words is "sixty-six million, two hundred twenty-six thousand, five hundred fifty-three".