66432212 has 24 divisors (see below), whose sum is σ = 144943680. Its totient is φ = 25882560.

The previous prime is 66432169. The next prime is 66432217. The reversal of 66432212 is 21223466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66432217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107537 + ... + 108152.

It is an arithmetic number, because the mean of its divisors is an integer number (6039320).

Almost surely, 2^66432212 is an apocalyptic number.

It is an amenable number.

66432212 is an abundant number, since it is smaller than the sum of its proper divisors (78511468).

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

66432212 is a wasteful number, since it uses less digits than its factorization.

66432212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215711 (or 215709 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The square root of 66432212 is about 8150.5958064426. The cubic root of 66432212 is about 405.0042411790.

Adding to 66432212 its reverse (21223466), we get a palindrome (87655678).

The spelling of 66432212 in words is "sixty-six million, four hundred thirty-two thousand, two hundred twelve".