66225612 has 48 divisors (see below), whose sum is σ = 159062400. Its totient is φ = 21436800.

The previous prime is 66225587. The next prime is 66225613. The reversal of 66225612 is 21652266.

It is a self number, because there is not a number n which added to its sum of digits gives 66225612.

It is not an unprimeable number, because it can be changed into a prime (66225613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62487 + ... + 63537.

It is an arithmetic number, because the mean of its divisors is an integer number (3313800).

Almost surely, 2^66225612 is an apocalyptic number.

It is an amenable number.

66225612 is an abundant number, since it is smaller than the sum of its proper divisors (92836788).

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

66225612 is a wasteful number, since it uses less digits than its factorization.

66225612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206 (or 1204 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 66225612 is about 8137.9120172192. The cubic root of 66225612 is about 404.5839592904.

Adding to 66225612 its reverse (21652266), we get a palindrome (87877878).

The spelling of 66225612 in words is "sixty-six million, two hundred twenty-five thousand, six hundred twelve".