66034665 has 24 divisors (see below), whose sum is σ = 114758280. Its totient is φ = 35126784.

The previous prime is 66034649. The next prime is 66034667. The reversal of 66034665 is 56643066.

66034665 is a `hidden beast` number, since 6 + 603 + 46 + 6 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 10323369 + 55711296 = 3213^2 + 7464^2 .

It is not a de Polignac number, because 66034665 - 2⁴ = 66034649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66034667) 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 23 ways as a sum of consecutive naturals, for example, 17791 + ... + 21179.

It is an arithmetic number, because the mean of its divisors is an integer number (4781595).

Almost surely, 2^66034665 is an apocalyptic number.

It is an amenable number.

66034665 is a deficient number, since it is larger than the sum of its proper divisors (48723615).

66034665 is a wasteful number, since it uses less digits than its factorization.

66034665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3833 (or 3830 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 66034665 is about 8126.1716078360. The cubic root of 66034665 is about 404.1947419946.

The spelling of 66034665 in words is "sixty-six million, thirty-four thousand, six hundred sixty-five".