66424113 has 24 divisors (see below), whose sum is σ = 111990528. Its totient is φ = 37147392.

The previous prime is 66424109. The next prime is 66424129. The reversal of 66424113 is 31142466.

66424113 is a `hidden beast` number, since 6 + 642 + 4 + 1 + 13 = 666.

It is not a de Polignac number, because 66424113 - 2² = 66424109 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66424013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8256 + ... + 14177.

It is an arithmetic number, because the mean of its divisors is an integer number (4666272).

Almost surely, 2^66424113 is an apocalyptic number.

66424113 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

66424113 is a deficient number, since it is larger than the sum of its proper divisors (45566415).

66424113 is a wasteful number, since it uses less digits than its factorization.

66424113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22493 (or 22490 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 66424113 is about 8150.0989564545. The cubic root of 66424113 is about 404.9877819817.

Adding to 66424113 its reverse (31142466), we get a palindrome (97566579).

The spelling of 66424113 in words is "sixty-six million, four hundred twenty-four thousand, one hundred thirteen".