666315269 has 2 divisors, whose sum is σ = 666315270. Its totient is φ = 666315268.

The previous prime is 666315263. The next prime is 666315283. The reversal of 666315269 is 962513666.

666315269 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 649587169 + 16728100 = 25487^2 + 4090^2 .

It is a cyclic number.

It is not a de Polignac number, because 666315269 - 2⁴ = 666315253 is a prime.

It is a super-2 number, since 2×666315269² = 887952075405084722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666315263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333157634 + 333157635.

It is an arithmetic number, because the mean of its divisors is an integer number (333157635).

Almost surely, 2^666315269 is an apocalyptic number.

It is an amenable number.

666315269 is a deficient number, since it is larger than the sum of its proper divisors (1).

666315269 is an equidigital number, since it uses as much as digits as its factorization.

666315269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 44.

The square root of 666315269 is about 25813.0832912304. The cubic root of 666315269 is about 873.4269506924.

The spelling of 666315269 in words is "six hundred sixty-six million, three hundred fifteen thousand, two hundred sixty-nine".