666356350607 has 2 divisors, whose sum is σ = 666356350608. Its totient is φ = 666356350606.

The previous prime is 666356350601. The next prime is 666356350609. The reversal of 666356350607 is 706053653666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666356350607 - 2¹⁴ = 666356334223 is a prime.

Together with 666356350609, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666356350601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333178175303 + 333178175304.

It is an arithmetic number, because the mean of its divisors is an integer number (333178175304).

Almost surely, 2^666356350607 is an apocalyptic number.

666356350607 is a deficient number, since it is larger than the sum of its proper divisors (1).

666356350607 is an equidigital number, since it uses as much as digits as its factorization.

666356350607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12247200, while the sum is 53.

The spelling of 666356350607 in words is "six hundred sixty-six billion, three hundred fifty-six million, three hundred fifty thousand, six hundred seven".