66600911 has 16 divisors (see below), whose sum is σ = 74027520. Its totient is φ = 59535840.

The previous prime is 66600901. The next prime is 66600929. The reversal of 66600911 is 11900666.

It is not a de Polignac number, because 66600911 - 2²² = 62406607 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66600901) 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 15 ways as a sum of consecutive naturals, for example, 53846 + ... + 55068.

It is an arithmetic number, because the mean of its divisors is an integer number (4626720).

Almost surely, 2^66600911 is an apocalyptic number.

66600911 is a deficient number, since it is larger than the sum of its proper divisors (7426609).

66600911 is a wasteful number, since it uses less digits than its factorization.

66600911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 66600911 is about 8160.9381200938. The cubic root of 66600911 is about 405.3467761014.

The spelling of 66600911 in words is "sixty-six million, six hundred thousand, nine hundred eleven".