66009706 has 8 divisors (see below), whose sum is σ = 113159520. Its totient is φ = 28289868.

The previous prime is 66009703. The next prime is 66009709. The reversal of 66009706 is 60790066.

It is an interprime number because it is at equal distance from previous prime (66009703) and next prime (66009709).

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

It is not an unprimeable number, because it can be changed into a prime (66009703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2357476 + ... + 2357503.

It is an arithmetic number, because the mean of its divisors is an integer number (14144940).

Almost surely, 2^66009706 is an apocalyptic number.

66009706 is a deficient number, since it is larger than the sum of its proper divisors (47149814).

66009706 is a wasteful number, since it uses less digits than its factorization.

66009706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4714988.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 66009706 is about 8124.6357456812. The cubic root of 66009706 is about 404.1438113314.

The spelling of 66009706 in words is "sixty-six million, nine thousand, seven hundred six".