66165212 has 12 divisors (see below), whose sum is σ = 115875816. Its totient is φ = 33057840.

The previous prime is 66165149. The next prime is 66165217. The reversal of 66165212 is 21256166.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66165217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662 + ... + 11522.

It is an arithmetic number, because the mean of its divisors is an integer number (9656318).

Almost surely, 2^66165212 is an apocalyptic number.

It is an amenable number.

66165212 is a deficient number, since it is larger than the sum of its proper divisors (49710604).

66165212 is a wasteful number, since it uses less digits than its factorization.

66165212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12388 (or 12386 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 66165212 is about 8134.2001450665. The cubic root of 66165212 is about 404.4609237897.

The spelling of 66165212 in words is "sixty-six million, one hundred sixty-five thousand, two hundred twelve".