660747503 has 16 divisors (see below), whose sum is σ = 733101600. Its totient is φ = 591663744.

The previous prime is 660747491. The next prime is 660747539. The reversal of 660747503 is 305747066.

It is a cyclic number.

It is not a de Polignac number, because 660747503 - 2⁸ = 660747247 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 (660747583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79325 + ... + 87257.

It is an arithmetic number, because the mean of its divisors is an integer number (45818850).

Almost surely, 2^660747503 is an apocalyptic number.

660747503 is a deficient number, since it is larger than the sum of its proper divisors (72354097).

660747503 is a wasteful number, since it uses less digits than its factorization.

660747503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8138.

The product of its (nonzero) digits is 105840, while the sum is 38.

The square root of 660747503 is about 25705.0092978003. The cubic root of 660747503 is about 870.9873420943.

The spelling of 660747503 in words is "six hundred sixty million, seven hundred forty-seven thousand, five hundred three".