66050509 has 8 divisors (see below), whose sum is σ = 75535488. Its totient is φ = 56577840.

The previous prime is 66050497. The next prime is 66050527. The reversal of 66050509 is 90505066.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66050509 - 2⁵ = 66050477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66050539) 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 7 ways as a sum of consecutive naturals, for example, 19104 + ... + 22294.

It is an arithmetic number, because the mean of its divisors is an integer number (9441936).

Almost surely, 2^66050509 is an apocalyptic number.

It is an amenable number.

66050509 is a deficient number, since it is larger than the sum of its proper divisors (9484979).

66050509 is a wasteful number, since it uses less digits than its factorization.

66050509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6155.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 66050509 is about 8127.1464241762. The cubic root of 66050509 is about 404.2270661756.

The spelling of 66050509 in words is "sixty-six million, fifty thousand, five hundred nine".