660051 has 12 divisors (see below), whose sum is σ = 1089712. Its totient is φ = 377136.

The previous prime is 660047. The next prime is 660053. The reversal of 660051 is 150066.

660051 is a `hidden beast` number, since 660 + 0 + 5 + 1 = 666.

660051 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 660051 - 2² = 660047 is a prime.

It is a Duffinian number.

660051 is strictly pandigital in base 7.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5176 + ... + 5301.

2⁶⁶⁰⁰⁵¹ is an apocalyptic number.

660051 is a deficient number, since it is larger than the sum of its proper divisors (429661).

660051 is a wasteful number, since it uses less digits than its factorization.

660051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10490 (or 10487 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 660051 is about 812.4352281875. The cubic root of 660051 is about 87.0681194599.

The spelling of 660051 in words is "six hundred sixty thousand, fifty-one".