66216324 has 24 divisors (see below), whose sum is σ = 154703808. Its totient is φ = 22043680.

The previous prime is 66216323. The next prime is 66216361. The reversal of 66216324 is 42361266.

It is a super-3 number, since 3×66216324³ (a number of 24 digits) contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 66216291 and 66216300.

It is not an unprimeable number, because it can be changed into a prime (66216323) 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, 7534 + ... + 13754.

It is an arithmetic number, because the mean of its divisors is an integer number (6445992).

Almost surely, 2^66216324 is an apocalyptic number.

It is an amenable number.

66216324 is an abundant number, since it is smaller than the sum of its proper divisors (88487484).

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

66216324 is a wasteful number, since it uses less digits than its factorization.

66216324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7115 (or 7113 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

The square root of 66216324 is about 8137.3413348587. The cubic root of 66216324 is about 404.5650443953.

The spelling of 66216324 in words is "sixty-six million, two hundred sixteen thousand, three hundred twenty-four".