66061653 has 12 divisors (see below), whose sum is σ = 102463200. Its totient is φ = 37749432.

The previous prime is 66061637. The next prime is 66061661. The reversal of 66061653 is 35616066.

It is not a de Polignac number, because 66061653 - 2⁴ = 66061637 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66061603) 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, 224553 + ... + 224846.

It is an arithmetic number, because the mean of its divisors is an integer number (8538600).

Almost surely, 2^66061653 is an apocalyptic number.

It is an amenable number.

66061653 is a deficient number, since it is larger than the sum of its proper divisors (36401547).

66061653 is a wasteful number, since it uses less digits than its factorization.

66061653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449416 (or 449409 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 66061653 is about 8127.8319987559. The cubic root of 66061653 is about 404.2497985419.

The spelling of 66061653 in words is "sixty-six million, sixty-one thousand, six hundred fifty-three".