660497 has 4 divisors (see below), whose sum is σ = 695280. Its totient is φ = 625716.

The previous prime is 660493. The next prime is 660503. The reversal of 660497 is 794066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 660497 - 2² = 660493 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 660497.

It is not an unprimeable number, because it can be changed into a prime (660493) 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, 17363 + ... + 17400.

It is an arithmetic number, because the mean of its divisors is an integer number (173820).

2⁶⁶⁰⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

660497 is a deficient number, since it is larger than the sum of its proper divisors (34783).

660497 is a wasteful number, since it uses less digits than its factorization.

660497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34782.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 660497 is about 812.7096652557. The cubic root of 660497 is about 87.0877258429.

The spelling of 660497 in words is "six hundred sixty thousand, four hundred ninety-seven".