66102212 has 12 divisors (see below), whose sum is σ = 126195216. Its totient is φ = 30046440.

The previous prime is 66102193. The next prime is 66102221. The reversal of 66102212 is 21220166.

It is a happy number.

66102212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 751118 + ... + 751205.

It is an arithmetic number, because the mean of its divisors is an integer number (10516268).

Almost surely, 2^66102212 is an apocalyptic number.

It is an amenable number.

66102212 is a deficient number, since it is larger than the sum of its proper divisors (60093004).

66102212 is a wasteful number, since it uses less digits than its factorization.

66102212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502338 (or 1502336 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 66102212 is about 8130.3266847034. The cubic root of 66102212 is about 404.3325122520.

Adding to 66102212 its reverse (21220166), we get a palindrome (87322378).

The spelling of 66102212 in words is "sixty-six million, one hundred two thousand, two hundred twelve".