66995422 has 16 divisors (see below), whose sum is σ = 108697680. Its totient is φ = 30785472.

The previous prime is 66995413. The next prime is 66995429. The reversal of 66995422 is 22459966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66995429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529 + ... + 11587.

It is an arithmetic number, because the mean of its divisors is an integer number (6793605).

Almost surely, 2^66995422 is an apocalyptic number.

66995422 is a deficient number, since it is larger than the sum of its proper divisors (41702258).

66995422 is a wasteful number, since it uses less digits than its factorization.

66995422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11307.

The product of its digits is 233280, while the sum is 43.

The square root of 66995422 is about 8185.0731212372. The cubic root of 66995422 is about 406.1455592034.

It can be divided in two parts, 6699 and 5422, that added together give a palindrome (12121).

The spelling of 66995422 in words is "sixty-six million, nine hundred ninety-five thousand, four hundred twenty-two".