664798363 has 2 divisors, whose sum is σ = 664798364. Its totient is φ = 664798362.

The previous prime is 664798331. The next prime is 664798411. The reversal of 664798363 is 363897466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664798363 - 2⁵ = 664798331 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664798363.

It is not a weakly prime, because it can be changed into another prime (664798763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332399181 + 332399182.

It is an arithmetic number, because the mean of its divisors is an integer number (332399182).

Almost surely, 2^664798363 is an apocalyptic number.

664798363 is a deficient number, since it is larger than the sum of its proper divisors (1).

664798363 is an equidigital number, since it uses as much as digits as its factorization.

664798363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 52.

The square root of 664798363 is about 25783.6840463111. The cubic root of 664798363 is about 872.7636444336.

The spelling of 664798363 in words is "six hundred sixty-four million, seven hundred ninety-eight thousand, three hundred sixty-three".