66212522 has 8 divisors (see below), whose sum is σ = 99639072. Its totient is φ = 32999500.

The previous prime is 66212521. The next prime is 66212527. The reversal of 66212522 is 22521266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 66212491 and 66212500.

It is not an unprimeable number, because it can be changed into a prime (66212521) 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, 52604 + ... + 53847.

It is an arithmetic number, because the mean of its divisors is an integer number (12454884).

Almost surely, 2^66212522 is an apocalyptic number.

66212522 is a deficient number, since it is larger than the sum of its proper divisors (33426550).

66212522 is a wasteful number, since it uses less digits than its factorization.

66212522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106764.

The product of its digits is 2880, while the sum is 26.

The square root of 66212522 is about 8137.1077171191. The cubic root of 66212522 is about 404.5573011600.

Adding to 66212522 its reverse (22521266), we get a palindrome (88733788).

The spelling of 66212522 in words is "sixty-six million, two hundred twelve thousand, five hundred twenty-two".