66060560 has 40 divisors (see below), whose sum is σ = 156120216. Its totient is φ = 25989120.

The previous prime is 66060559. The next prime is 66060563. The reversal of 66060560 is 6506066.

It can be written as a sum of positive squares in 4 ways, for example, as 7139584 + 58920976 = 2672^2 + 7676^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (66060563) 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, 1889 + ... + 11648.

Almost surely, 2^66060560 is an apocalyptic number.

It is an amenable number.

66060560 is an abundant number, since it is smaller than the sum of its proper divisors (90059656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66060560 is a wasteful number, since it uses less digits than its factorization.

66060560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13611 (or 13605 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 66060560 is about 8127.7647603754. The cubic root of 66060560 is about 404.2475690717.

The spelling of 66060560 in words is "sixty-six million, sixty thousand, five hundred sixty".