66560530 has 16 divisors (see below), whose sum is σ = 119914200. Its totient is φ = 26600832.

The previous prime is 66560513. The next prime is 66560537. The reversal of 66560530 is 3506566.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 49660209 + 16900321 = 7047^2 + 4111^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66560492 and 66560501.

It is not an unprimeable number, because it can be changed into a prime (66560537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13342 + ... + 17638.

Almost surely, 2^66560530 is an apocalyptic number.

66560530 is a deficient number, since it is larger than the sum of its proper divisors (53353670).

66560530 is a wasteful number, since it uses less digits than its factorization.

66560530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5853.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 66560530 is about 8158.4637034187. The cubic root of 66560530 is about 405.2648371953.

The spelling of 66560530 in words is "sixty-six million, five hundred sixty thousand, five hundred thirty".