1336666217 has 2 divisors, whose sum is σ = 1336666218. Its totient is φ = 1336666216.

The previous prime is 1336666213. The next prime is 1336666267. The reversal of 1336666217 is 7126666331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1131918736 + 204747481 = 33644^2 + 14309^2 .

It is a cyclic number.

It is not a de Polignac number, because 1336666217 - 2² = 1336666213 is a prime.

It is not a weakly prime, because it can be changed into another prime (1336666213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 668333108 + 668333109.

It is an arithmetic number, because the mean of its divisors is an integer number (668333109).

Almost surely, 2^1336666217 is an apocalyptic number.

It is an amenable number.

1336666217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1336666217 is an equidigital number, since it uses as much as digits as its factorization.

1336666217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 41.

The square root of 1336666217 is about 36560.4460722240. The cubic root of 1336666217 is about 1101.5587315118.

The spelling of 1336666217 in words is "one billion, three hundred thirty-six million, six hundred sixty-six thousand, two hundred seventeen".