66144622 has 16 divisors (see below), whose sum is σ = 100835280. Its totient is φ = 32536768.

The previous prime is 66144613. The next prime is 66144623. The reversal of 66144622 is 22644166.

It is a super-2 number, since 2×66144622² = 8750222039045768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66144623) 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, 39588 + ... + 41224.

It is an arithmetic number, because the mean of its divisors is an integer number (6302205).

Almost surely, 2^66144622 is an apocalyptic number.

66144622 is a deficient number, since it is larger than the sum of its proper divisors (34690658).

66144622 is a wasteful number, since it uses less digits than its factorization.

66144622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955.

The product of its digits is 13824, while the sum is 31.

The square root of 66144622 is about 8132.9344027848. The cubic root of 66144622 is about 404.4189646082.

Adding to 66144622 its reverse (22644166), we get a palindrome (88788788).

It can be divided in two parts, 66144 and 622, that added together give a palindrome (66766).

The spelling of 66144622 in words is "sixty-six million, one hundred forty-four thousand, six hundred twenty-two".