66260909 has 8 divisors (see below), whose sum is σ = 77845152. Its totient is φ = 55603440.

The previous prime is 66260899. The next prime is 66260933. The reversal of 66260909 is 90906266.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66260909 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66260959) 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 7 ways as a sum of consecutive naturals, for example, 231539 + ... + 231824.

It is an arithmetic number, because the mean of its divisors is an integer number (9730644).

Almost surely, 2^66260909 is an apocalyptic number.

It is an amenable number.

66260909 is a deficient number, since it is larger than the sum of its proper divisors (11584243).

66260909 is a wasteful number, since it uses less digits than its factorization.

66260909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463387.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 66260909 is about 8140.0804050083. The cubic root of 66260909 is about 404.6558250597.

The spelling of 66260909 in words is "sixty-six million, two hundred sixty thousand, nine hundred nine".