660056 has 8 divisors (see below), whose sum is σ = 1237620. Its totient is φ = 330024.

The previous prime is 660053. The next prime is 660061. The reversal of 660056 is 650066.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41246 + ... + 41261.

2⁶⁶⁰⁰⁵⁶ is an apocalyptic number.

It is an amenable number.

660056 is a deficient number, since it is larger than the sum of its proper divisors (577564).

660056 is a wasteful number, since it uses less digits than its factorization.

660056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82513 (or 82509 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 660056 is about 812.4383053500. The cubic root of 660056 is about 87.0683393113.

The spelling of 660056 in words is "six hundred sixty thousand, fifty-six".