66161522 has 16 divisors (see below), whose sum is σ = 113564160. Its totient is φ = 28318848.

The previous prime is 66161521. The next prime is 66161531. The reversal of 66161522 is 22516166.

It is not an unprimeable number, because it can be changed into a prime (66161521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10463 + ... + 15549.

It is an arithmetic number, because the mean of its divisors is an integer number (7097760).

Almost surely, 2^66161522 is an apocalyptic number.

66161522 is a deficient number, since it is larger than the sum of its proper divisors (47402638).

66161522 is a wasteful number, since it uses less digits than its factorization.

66161522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6025.

The product of its digits is 4320, while the sum is 29.

The square root of 66161522 is about 8133.9733218151. The cubic root of 66161522 is about 404.4534047904.

Adding to 66161522 its reverse (22516166), we get a palindrome (88677688).

The spelling of 66161522 in words is "sixty-six million, one hundred sixty-one thousand, five hundred twenty-two".