66364224 has 28 divisors (see below), whose sum is σ = 175589184. Its totient is φ = 22121344.

The previous prime is 66364219. The next prime is 66364229. The reversal of 66364224 is 42246366.

It is an interprime number because it is at equal distance from previous prime (66364219) and next prime (66364229).

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 (66364229) 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, 172632 + ... + 173015.

Almost surely, 2^66364224 is an apocalyptic number.

66364224 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66364224 is an abundant number, since it is smaller than the sum of its proper divisors (109224960).

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

66364224 is a wasteful number, since it uses less digits than its factorization.

66364224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345662 (or 345652 counting only the distinct ones).

The product of its digits is 41472, while the sum is 33.

The square root of 66364224 is about 8146.4240007503. The cubic root of 66364224 is about 404.8660309830.

The spelling of 66364224 in words is "sixty-six million, three hundred sixty-four thousand, two hundred twenty-four".