66412 has 6 divisors (see below), whose sum is σ = 116228. Its totient is φ = 33204.

The previous prime is 66403. The next prime is 66413. The reversal of 66412 is 21466.

It is a self number, because there is not a number n which added to its sum of digits gives 66412.

It is not an unprimeable number, because it can be changed into a prime (66413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8298 + ... + 8305.

2⁶⁶⁴¹² is an apocalyptic number.

It is an amenable number.

66412 is a deficient number, since it is larger than the sum of its proper divisors (49816).

66412 is a wasteful number, since it uses less digits than its factorization.

66412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16607 (or 16605 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 66412 is about 257.7052579984. The cubic root of 66412 is about 40.4963162834.

Adding to 66412 its reverse (21466), we get a palindrome (87878).

It can be divided in two parts, 664 and 12, that added together give a palindrome (676).

The spelling of 66412 in words is "sixty-six thousand, four hundred twelve".