66061259 has 4 divisors (see below), whose sum is σ = 72066840. Its totient is φ = 60055680.

The previous prime is 66061253. The next prime is 66061321. The reversal of 66061259 is 95216066.

It is a happy number.

66061259 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66061259 - 2⁸ = 66061003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66061253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3002774 + ... + 3002795.

It is an arithmetic number, because the mean of its divisors is an integer number (18016710).

Almost surely, 2^66061259 is an apocalyptic number.

66061259 is a deficient number, since it is larger than the sum of its proper divisors (6005581).

66061259 is a wasteful number, since it uses less digits than its factorization.

66061259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6005580.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 66061259 is about 8127.8077610140. The cubic root of 66061259 is about 404.2489948748.

The spelling of 66061259 in words is "sixty-six million, sixty-one thousand, two hundred fifty-nine".