66224722 has 8 divisors (see below), whose sum is σ = 100453500. Its totient is φ = 32740224.

The previous prime is 66224701. The next prime is 66224729. The reversal of 66224722 is 22742266.

It can be written as a sum of positive squares in 2 ways, for example, as 65141041 + 1083681 = 8071^2 + 1041^2 .

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

It is not an unprimeable number, because it can be changed into a prime (66224729) 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, 185847 + ... + 186202.

Almost surely, 2^66224722 is an apocalyptic number.

66224722 is a deficient number, since it is larger than the sum of its proper divisors (34228778).

66224722 is a wasteful number, since it uses less digits than its factorization.

66224722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372140.

The product of its digits is 16128, while the sum is 31.

The square root of 66224722 is about 8137.8573347043. The cubic root of 66224722 is about 404.5821468932.

Adding to 66224722 its reverse (22742266), we get a palindrome (88966988).

The spelling of 66224722 in words is "sixty-six million, two hundred twenty-four thousand, seven hundred twenty-two".