1664424320503 has 8 divisors (see below), whose sum is σ = 1963560488960. Its totient is φ = 1380628468440.

The previous prime is 1664424320413. The next prime is 1664424320527. The reversal of 1664424320503 is 3050234244661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1664424320503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664424320563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3835078863 + ... + 3835079296.

It is an arithmetic number, because the mean of its divisors is an integer number (245445061120).

Almost surely, 2^{1664424320503} is an apocalyptic number.

1664424320503 is a deficient number, since it is larger than the sum of its proper divisors (299136168457).

1664424320503 is an equidigital number, since it uses as much as digits as its factorization.

1664424320503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7670158197.

The product of its (nonzero) digits is 414720, while the sum is 40.

The spelling of 1664424320503 in words is "one trillion, six hundred sixty-four billion, four hundred twenty-four million, three hundred twenty thousand, five hundred three".