66352212 has 18 divisors (see below), whose sum is σ = 167723738. Its totient is φ = 22117392.

The previous prime is 66352193. The next prime is 66352219. The reversal of 66352212 is 21225366.

66352212 is a `hidden beast` number, since 6 + 635 + 2 + 21 + 2 = 666.

66352212 is nontrivially palindromic in base 11.

It can be written as a sum of positive squares in only one way, i.e., 65999376 + 352836 = 8124^2 + 594^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66352219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 921523 + ... + 921594.

Almost surely, 2^66352212 is an apocalyptic number.

It is an amenable number.

66352212 is an abundant number, since it is smaller than the sum of its proper divisors (101371526).

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

66352212 is a wasteful number, since it uses less digits than its factorization.

66352212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843127 (or 1843122 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 66352212 is about 8145.6867113829. The cubic root of 66352212 is about 404.8416024384.

Adding to 66352212 its reverse (21225366), we get a palindrome (87577578).

It can be divided in two parts, 66352 and 212, that added together give a square (66564 = 258²).

The spelling of 66352212 in words is "sixty-six million, three hundred fifty-two thousand, two hundred twelve".