660504513 has 8 divisors (see below), whose sum is σ = 880907488. Its totient is φ = 440218944.

The previous prime is 660504503. The next prime is 660504529. The reversal of 660504513 is 315405066.

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

It is a de Polignac number, because none of the positive numbers 2^k-660504513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660504503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15256 + ... + 39417.

It is an arithmetic number, because the mean of its divisors is an integer number (110113436).

Almost surely, 2^660504513 is an apocalyptic number.

It is an amenable number.

660504513 is a deficient number, since it is larger than the sum of its proper divisors (220402975).

660504513 is a wasteful number, since it uses less digits than its factorization.

660504513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58703.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 660504513 is about 25700.2823525346. The cubic root of 660504513 is about 870.8805604254.

Adding to 660504513 its reverse (315405066), we get a palindrome (975909579).

The spelling of 660504513 in words is "six hundred sixty million, five hundred four thousand, five hundred thirteen".