66142244 has 24 divisors (see below), whose sum is σ = 132480768. Its totient is φ = 28304640.

The previous prime is 66142217. The next prime is 66142247. The reversal of 66142244 is 44224166.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66142247) 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, 24212 + ... + 26804.

It is an arithmetic number, because the mean of its divisors is an integer number (5520032).

Almost surely, 2^66142244 is an apocalyptic number.

It is an amenable number.

66142244 is an abundant number, since it is smaller than the sum of its proper divisors (66338524).

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

66142244 is a wasteful number, since it uses less digits than its factorization.

66142244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3515 (or 3513 counting only the distinct ones).

The product of its digits is 9216, while the sum is 29.

The square root of 66142244 is about 8132.7882057754. The cubic root of 66142244 is about 404.4141180573.

The spelling of 66142244 in words is "sixty-six million, one hundred forty-two thousand, two hundred forty-four".