66452216 has 24 divisors (see below), whose sum is σ = 125808480. Its totient is φ = 32905728.

The previous prime is 66452213. The next prime is 66452227. The reversal of 66452216 is 61225466.

It is a super-2 number, since 2×66452216² = 8831794022621312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66452213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 297881 + ... + 298103.

It is an arithmetic number, because the mean of its divisors is an integer number (5242020).

Almost surely, 2^66452216 is an apocalyptic number.

It is an amenable number.

66452216 is a deficient number, since it is larger than the sum of its proper divisors (59356264).

66452216 is a wasteful number, since it uses less digits than its factorization.

66452216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 418 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 66452216 is about 8151.8228636300. The cubic root of 66452216 is about 405.0448885875.

The spelling of 66452216 in words is "sixty-six million, four hundred fifty-two thousand, two hundred sixteen".