660507 has 4 divisors (see below), whose sum is σ = 880680. Its totient is φ = 440336.

The previous prime is 660503. The next prime is 660509. The reversal of 660507 is 705066.

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 660507 - 2² = 660503 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (660503) 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, 110082 + ... + 110087.

It is an arithmetic number, because the mean of its divisors is an integer number (220170).

2⁶⁶⁰⁵⁰⁷ is an apocalyptic number.

660507 is a deficient number, since it is larger than the sum of its proper divisors (220173).

660507 is a wasteful number, since it uses less digits than its factorization.

660507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220172.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 660507 is about 812.7158174910. The cubic root of 660507 is about 87.0881653467.

The spelling of 660507 in words is "six hundred sixty thousand, five hundred seven".