66164517 has 12 divisors (see below), whose sum is σ = 100601280. Its totient is φ = 41788008.

The previous prime is 66164513. The next prime is 66164519. The reversal of 66164517 is 71546166.

66164517 is a `hidden beast` number, since 6 + 6 + 1 + 645 + 1 + 7 = 666.

It is not a de Polignac number, because 66164517 - 2² = 66164513 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66164513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 193293 + ... + 193634.

It is an arithmetic number, because the mean of its divisors is an integer number (8383440).

Almost surely, 2^66164517 is an apocalyptic number.

It is an amenable number.

66164517 is a deficient number, since it is larger than the sum of its proper divisors (34436763).

66164517 is a wasteful number, since it uses less digits than its factorization.

66164517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386952 (or 386949 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 66164517 is about 8134.1574240975. The cubic root of 66164517 is about 404.4595076310.

The spelling of 66164517 in words is "sixty-six million, one hundred sixty-four thousand, five hundred seventeen".