668107403 has 2 divisors, whose sum is σ = 668107404. Its totient is φ = 668107402.

The previous prime is 668107399. The next prime is 668107457. The reversal of 668107403 is 304701866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 668107403 - 2² = 668107399 is a prime.

It is not a weakly prime, because it can be changed into another prime (668107903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334053701 + 334053702.

It is an arithmetic number, because the mean of its divisors is an integer number (334053702).

Almost surely, 2^668107403 is an apocalyptic number.

668107403 is a deficient number, since it is larger than the sum of its proper divisors (1).

668107403 is an equidigital number, since it uses as much as digits as its factorization.

668107403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 668107403 is about 25847.7736565454. The cubic root of 668107403 is about 874.2093115102.

The spelling of 668107403 in words is "six hundred sixty-eight million, one hundred seven thousand, four hundred three".