665050503 has 16 divisors (see below), whose sum is σ = 964221440. Its totient is φ = 405285984.

The previous prime is 665050501. The next prime is 665050549. The reversal of 665050503 is 305050566.

It is not a de Polignac number, because 665050503 - 2¹ = 665050501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665050501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78763 + ... + 86796.

It is an arithmetic number, because the mean of its divisors is an integer number (60263840).

Almost surely, 2^665050503 is an apocalyptic number.

665050503 is a deficient number, since it is larger than the sum of its proper divisors (299170937).

665050503 is a wasteful number, since it uses less digits than its factorization.

665050503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165678.

The product of its (nonzero) digits is 13500, while the sum is 30.

The square root of 665050503 is about 25788.5731090342. The cubic root of 665050503 is about 872.8739690185.

The spelling of 665050503 in words is "six hundred sixty-five million, fifty thousand, five hundred three".