66223416 has 32 divisors (see below), whose sum is σ = 189210240. Its totient is φ = 18920928.

The previous prime is 66223411. The next prime is 66223427. The reversal of 66223416 is 61432266.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66223411) 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, 196926 + ... + 197261.

It is an arithmetic number, because the mean of its divisors is an integer number (5912820).

Almost surely, 2^66223416 is an apocalyptic number.

It is an amenable number.

66223416 is an abundant number, since it is smaller than the sum of its proper divisors (122986824).

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

66223416 is a wasteful number, since it uses less digits than its factorization.

66223416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394203 (or 394199 counting only the distinct ones).

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

The square root of 66223416 is about 8137.7770920565. Note that the first 3 decimals coincide. The cubic root of 66223416 is about 404.5794873237.

The spelling of 66223416 in words is "sixty-six million, two hundred twenty-three thousand, four hundred sixteen".