66522232 has 16 divisors (see below), whose sum is σ = 142547760. Its totient is φ = 28509504.

The previous prime is 66522229. The next prime is 66522257. The reversal of 66522232 is 23222566.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 66522232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 593893 + ... + 594004.

It is an arithmetic number, because the mean of its divisors is an integer number (8909235).

Almost surely, 2^66522232 is an apocalyptic number.

It is an amenable number.

66522232 is an abundant number, since it is smaller than the sum of its proper divisors (76025528).

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

66522232 is a wasteful number, since it uses less digits than its factorization.

66522232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187910 (or 1187906 counting only the distinct ones).

The product of its digits is 8640, while the sum is 28.

The square root of 66522232 is about 8156.1162326195. The cubic root of 66522232 is about 405.1870943722.

Adding to 66522232 its reverse (23222566), we get a palindrome (89744798).

The spelling of 66522232 in words is "sixty-six million, five hundred twenty-two thousand, two hundred thirty-two".