668383607 has 2 divisors, whose sum is σ = 668383608. Its totient is φ = 668383606.

The previous prime is 668383603. The next prime is 668383609. The reversal of 668383607 is 706383866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 668383607 - 2² = 668383603 is a prime.

It is a super-2 number, since 2×668383607² = 893473292212660898, which contains 22 as substring.

Together with 668383609, 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 (668383603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334191803 + 334191804.

It is an arithmetic number, because the mean of its divisors is an integer number (334191804).

Almost surely, 2^668383607 is an apocalyptic number.

668383607 is a deficient number, since it is larger than the sum of its proper divisors (1).

668383607 is an equidigital number, since it uses as much as digits as its factorization.

668383607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 668383607 is about 25853.1160017511. The cubic root of 668383607 is about 874.3297646195.

The spelling of 668383607 in words is "six hundred sixty-eight million, three hundred eighty-three thousand, six hundred seven".