665432747503 has 4 divisors (see below), whose sum is σ = 667888219168. Its totient is φ = 662977275840.

The previous prime is 665432747431. The next prime is 665432747513. The reversal of 665432747503 is 305747234566.

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-665432747503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665432747513) 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, 1227735426 + ... + 1227735967.

It is an arithmetic number, because the mean of its divisors is an integer number (166972054792).

Almost surely, 2^665432747503 is an apocalyptic number.

665432747503 is a deficient number, since it is larger than the sum of its proper divisors (2455471665).

665432747503 is a wasteful number, since it uses less digits than its factorization.

665432747503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455471664.

The product of its (nonzero) digits is 12700800, while the sum is 52.

The spelling of 665432747503 in words is "six hundred sixty-five billion, four hundred thirty-two million, seven hundred forty-seven thousand, five hundred three".