66203461 has 2 divisors, whose sum is σ = 66203462. Its totient is φ = 66203460.

The previous prime is 66203447. The next prime is 66203477. The reversal of 66203461 is 16430266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40132225 + 26071236 = 6335^2 + 5106^2 .

It is a cyclic number.

It is not a de Polignac number, because 66203461 - 2¹¹ = 66201413 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66203441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33101730 + 33101731.

It is an arithmetic number, because the mean of its divisors is an integer number (33101731).

Almost surely, 2^66203461 is an apocalyptic number.

It is an amenable number.

66203461 is a deficient number, since it is larger than the sum of its proper divisors (1).

66203461 is an equidigital number, since it uses as much as digits as its factorization.

66203461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 66203461 is about 8136.5509277580. The cubic root of 66203461 is about 404.5388461366.

The spelling of 66203461 in words is "sixty-six million, two hundred three thousand, four hundred sixty-one".