660500061 has 48 divisors (see below), whose sum is σ = 992779200. Its totient is φ = 388219392.

The previous prime is 660500051. The next prime is 660500083. The reversal of 660500061 is 160005066.

It is not a de Polignac number, because 660500061 - 2⁷ = 660499933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660500011) 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 47 ways as a sum of consecutive naturals, for example, 4751730 + ... + 4751868.

It is an arithmetic number, because the mean of its divisors is an integer number (20682900).

Almost surely, 2^660500061 is an apocalyptic number.

It is an amenable number.

660500061 is a deficient number, since it is larger than the sum of its proper divisors (332279139).

660500061 is a wasteful number, since it uses less digits than its factorization.

660500061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 660500061 is about 25700.1957385542. The cubic root of 660500061 is about 870.8786037550.

The spelling of 660500061 in words is "six hundred sixty million, five hundred thousand, sixty-one".