666452243 has 2 divisors, whose sum is σ = 666452244. Its totient is φ = 666452242.

The previous prime is 666452231. The next prime is 666452249. The reversal of 666452243 is 342254666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666452243 - 2⁶ = 666452179 is a prime.

It is equal to p_34603877 and since 666452243 and 34603877 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 666452197 and 666452206.

It is not a weakly prime, because it can be changed into another prime (666452249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333226121 + 333226122.

It is an arithmetic number, because the mean of its divisors is an integer number (333226122).

Almost surely, 2^666452243 is an apocalyptic number.

666452243 is a deficient number, since it is larger than the sum of its proper divisors (1).

666452243 is an equidigital number, since it uses as much as digits as its factorization.

666452243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 38.

The square root of 666452243 is about 25815.7363443308. The cubic root of 666452243 is about 873.4867965301.

The spelling of 666452243 in words is "six hundred sixty-six million, four hundred fifty-two thousand, two hundred forty-three".