66681105 has 16 divisors (see below), whose sum is σ = 107153280. Its totient is φ = 35408768.

The previous prime is 66681091. The next prime is 66681107. The reversal of 66681105 is 50118666.

It is a cyclic number.

It is not a de Polignac number, because 66681105 - 2⁵ = 66681073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66681107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6045 + ... + 13034.

It is an arithmetic number, because the mean of its divisors is an integer number (6697080).

Almost surely, 2^66681105 is an apocalyptic number.

It is an amenable number.

66681105 is a deficient number, since it is larger than the sum of its proper divisors (40472175).

66681105 is a wasteful number, since it uses less digits than its factorization.

66681105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19320.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 66681105 is about 8165.8499251456. The cubic root of 66681105 is about 405.5094032119.

The spelling of 66681105 in words is "sixty-six million, six hundred eighty-one thousand, one hundred five".