66156353 has 2 divisors, whose sum is σ = 66156354. Its totient is φ = 66156352.

The previous prime is 66156289. The next prime is 66156359. The reversal of 66156353 is 35365166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55606849 + 10549504 = 7457^2 + 3248^2 .

It is a cyclic number.

It is not a de Polignac number, because 66156353 - 2⁶ = 66156289 is a prime.

It is not a weakly prime, because it can be changed into another prime (66156359) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33078176 + 33078177.

It is an arithmetic number, because the mean of its divisors is an integer number (33078177).

Almost surely, 2^66156353 is an apocalyptic number.

It is an amenable number.

66156353 is a deficient number, since it is larger than the sum of its proper divisors (1).

66156353 is an equidigital number, since it uses as much as digits as its factorization.

66156353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 35.

The square root of 66156353 is about 8133.6555742175. The cubic root of 66156353 is about 404.4428716082.

The spelling of 66156353 in words is "sixty-six million, one hundred fifty-six thousand, three hundred fifty-three".