664108351 has 2 divisors, whose sum is σ = 664108352. Its totient is φ = 664108350.

The previous prime is 664108327. The next prime is 664108397. The reversal of 664108351 is 153801466.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664108351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664108321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332054175 + 332054176.

It is an arithmetic number, because the mean of its divisors is an integer number (332054176).

Almost surely, 2^664108351 is an apocalyptic number.

664108351 is a deficient number, since it is larger than the sum of its proper divisors (1).

664108351 is an equidigital number, since it uses as much as digits as its factorization.

664108351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 664108351 is about 25770.2997848298. The cubic root of 664108351 is about 872.4615849951.

The spelling of 664108351 in words is "six hundred sixty-four million, one hundred eight thousand, three hundred fifty-one".