66115412 has 24 divisors (see below), whose sum is σ = 126524160. Its totient is φ = 29980160.

The previous prime is 66115403. The next prime is 66115453. The reversal of 66115412 is 21451166.

66115412 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

66115412 is strictly pandigital in base 9.

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, 19508 + ... + 22644.

It is an arithmetic number, because the mean of its divisors is an integer number (5271840).

Almost surely, 2^66115412 is an apocalyptic number.

It is an amenable number.

66115412 is a deficient number, since it is larger than the sum of its proper divisors (60408748).

66115412 is a wasteful number, since it uses less digits than its factorization.

66115412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3631 (or 3629 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 66115412 is about 8131.1384196802. The cubic root of 66115412 is about 404.3594242810.

Adding to 66115412 its reverse (21451166), we get a palindrome (87566578).

It can be divided in two parts, 661154 and 12, that added together give a palindrome (661166).

The spelling of 66115412 in words is "sixty-six million, one hundred fifteen thousand, four hundred twelve".