66123622 has 8 divisors (see below), whose sum is σ = 99221472. Its totient is φ = 33049800.

The previous prime is 66123613. The next prime is 66123653. The reversal of 66123622 is 22632166.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4672 + ... + 12412.

It is an arithmetic number, because the mean of its divisors is an integer number (12402684).

Almost surely, 2^66123622 is an apocalyptic number.

66123622 is a deficient number, since it is larger than the sum of its proper divisors (33097850).

66123622 is a wasteful number, since it uses less digits than its factorization.

66123622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12014.

The product of its digits is 5184, while the sum is 28.

The square root of 66123622 is about 8131.6432533652. The cubic root of 66123622 is about 404.3761609408.

Adding to 66123622 its reverse (22632166), we get a palindrome (88755788).

The spelling of 66123622 in words is "sixty-six million, one hundred twenty-three thousand, six hundred twenty-two".