668700463 has 2 divisors, whose sum is σ = 668700464. Its totient is φ = 668700462.

The previous prime is 668700407. The next prime is 668700467. The reversal of 668700463 is 364007866.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-668700463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668700467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334350231 + 334350232.

It is an arithmetic number, because the mean of its divisors is an integer number (334350232).

Almost surely, 2^668700463 is an apocalyptic number.

668700463 is a deficient number, since it is larger than the sum of its proper divisors (1).

668700463 is an equidigital number, since it uses as much as digits as its factorization.

668700463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 668700463 is about 25859.2432797250. The cubic root of 668700463 is about 874.4679052835.

The spelling of 668700463 in words is "six hundred sixty-eight million, seven hundred thousand, four hundred sixty-three".