66442324 has 24 divisors (see below), whose sum is σ = 132585768. Its totient is φ = 28861440.

The previous prime is 66442301. The next prime is 66442339. The reversal of 66442324 is 42324466.

It can be written as a sum of positive squares in 4 ways, for example, as 4536900 + 61905424 = 2130^2 + 7868^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36697 + ... + 38464.

It is an arithmetic number, because the mean of its divisors is an integer number (5524407).

Almost surely, 2^66442324 is an apocalyptic number.

It is an amenable number.

66442324 is a deficient number, since it is larger than the sum of its proper divisors (66143444).

66442324 is a wasteful number, since it uses less digits than its factorization.

66442324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75195 (or 75193 counting only the distinct ones).

The product of its digits is 27648, while the sum is 31.

The square root of 66442324 is about 8151.2161055882. The cubic root of 66442324 is about 405.0247894190.

It can be divided in two parts, 66442 and 324, that added together give a palindrome (66766).

The spelling of 66442324 in words is "sixty-six million, four hundred forty-two thousand, three hundred twenty-four".