664265064403 has 4 divisors (see below), whose sum is σ = 664273520208. Its totient is φ = 664256608600.

The previous prime is 664265064383. The next prime is 664265064443. The reversal of 664265064403 is 304460562466.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664265064403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664265064443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4108951 + ... + 4267552.

It is an arithmetic number, because the mean of its divisors is an integer number (166068380052).

Almost surely, 2^664265064403 is an apocalyptic number.

664265064403 is a deficient number, since it is larger than the sum of its proper divisors (8455805).

664265064403 is an equidigital number, since it uses as much as digits as its factorization.

664265064403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8455804.

The product of its (nonzero) digits is 2488320, while the sum is 46.

The spelling of 664265064403 in words is "six hundred sixty-four billion, two hundred sixty-five million, sixty-four thousand, four hundred three".