66123412 has 12 divisors (see below), whose sum is σ = 116549440. Its totient is φ = 32823576.

The previous prime is 66123389. The next prime is 66123443. The reversal of 66123412 is 21432166.

It is a super-2 number, since 2×66123412² = 8744611229043488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58908 + ... + 60019.

Almost surely, 2^66123412 is an apocalyptic number.

It is an amenable number.

66123412 is a deficient number, since it is larger than the sum of its proper divisors (50426028).

66123412 is a wasteful number, since it uses less digits than its factorization.

66123412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119070 (or 119068 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 66123412 is about 8131.6303408357. The cubic root of 66123412 is about 404.3757328584.

Adding to 66123412 its reverse (21432166), we get a palindrome (87555578).

The spelling of 66123412 in words is "sixty-six million, one hundred twenty-three thousand, four hundred twelve".