66226706509 has 8 divisors (see below), whose sum is σ = 67494683520. Its totient is φ = 64963579296.

The previous prime is 66226706477. The next prime is 66226706531. The reversal of 66226706509 is 90560762266.

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 66226706509 - 2⁵ = 66226706477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66226706809) 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, 1184872 + ... + 1239505.

It is an arithmetic number, because the mean of its divisors is an integer number (8436835440).

Almost surely, 2^66226706509 is an apocalyptic number.

It is an amenable number.

66226706509 is a deficient number, since it is larger than the sum of its proper divisors (1267977011).

66226706509 is a wasteful number, since it uses less digits than its factorization.

66226706509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424899.

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 66226706509 in words is "sixty-six billion, two hundred twenty-six million, seven hundred six thousand, five hundred nine".