66278424 has 32 divisors (see below), whose sum is σ = 166011120. Its totient is φ = 22050816.

The previous prime is 66278423. The next prime is 66278453. The reversal of 66278424 is 42487266.

66278424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66278423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11904 + ... + 16560.

Almost surely, 2^66278424 is an apocalyptic number.

It is an amenable number.

66278424 is an abundant number, since it is smaller than the sum of its proper divisors (99732696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66278424 is a wasteful number, since it uses less digits than its factorization.

66278424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5259 (or 5255 counting only the distinct ones).

The product of its digits is 129024, while the sum is 39.

The square root of 66278424 is about 8141.1561832457. The cubic root of 66278424 is about 404.6914766602.

It can be divided in two parts, 6627 and 8424, that added together give a palindrome (15051).

The spelling of 66278424 in words is "sixty-six million, two hundred seventy-eight thousand, four hundred twenty-four".