660974503 has 4 divisors (see below), whose sum is σ = 755399440. Its totient is φ = 566549568.

The previous prime is 660974443. The next prime is 660974507. The reversal of 660974503 is 305479066.

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

It is a cyclic number.

It is not a de Polignac number, because 660974503 - 2²⁹ = 124103591 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 (660974507) 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, 47212458 + ... + 47212471.

It is an arithmetic number, because the mean of its divisors is an integer number (188849860).

Almost surely, 2^660974503 is an apocalyptic number.

660974503 is a deficient number, since it is larger than the sum of its proper divisors (94424937).

660974503 is an equidigital number, since it uses as much as digits as its factorization.

660974503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94424936.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 660974503 is about 25709.4244004023. The cubic root of 660974503 is about 871.0870733273.

The spelling of 660974503 in words is "six hundred sixty million, nine hundred seventy-four thousand, five hundred three".