66041117 has 4 divisors (see below), whose sum is σ = 66069180. Its totient is φ = 66013056.

The previous prime is 66041099. The next prime is 66041159. The reversal of 66041117 is 71114066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71114066 = 2 ⋅35557033.

It can be written as a sum of positive squares in 2 ways, for example, as 46158436 + 19882681 = 6794^2 + 4459^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66041117 is a prime.

It is a super-2 number, since 2×66041117² = 8722858269215378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66041917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10142 + ... + 15327.

It is an arithmetic number, because the mean of its divisors is an integer number (16517295).

Almost surely, 2^66041117 is an apocalyptic number.

It is an amenable number.

66041117 is a deficient number, since it is larger than the sum of its proper divisors (28063).

66041117 is a wasteful number, since it uses less digits than its factorization.

66041117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28062.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 66041117 is about 8126.5685870483. The cubic root of 66041117 is about 404.2079056845.

The spelling of 66041117 in words is "sixty-six million, forty-one thousand, one hundred seventeen".