66220024 has 16 divisors (see below), whose sum is σ = 133713720. Its totient is φ = 30563040.

The previous prime is 66220003. The next prime is 66220027. The reversal of 66220024 is 42002266.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66219977 and 66220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66220027) 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, 318262 + ... + 318469.

Almost surely, 2^66220024 is an apocalyptic number.

It is an amenable number.

66220024 is an abundant number, since it is smaller than the sum of its proper divisors (67493696).

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

66220024 is a wasteful number, since it uses less digits than its factorization.

66220024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636750 (or 636746 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 66220024 is about 8137.5686786656. The cubic root of 66220024 is about 404.5725796107.

The spelling of 66220024 in words is "sixty-six million, two hundred twenty thousand, twenty-four".