66142252 has 12 divisors (see below), whose sum is σ = 126271656. Its totient is φ = 30064640.

The previous prime is 66142247. The next prime is 66142259. The reversal of 66142252 is 25224166.

It is a pancake number, because a pancake can be divided into 66142252 parts by 11501 straight cuts.

It is a self number, because there is not a number n which added to its sum of digits gives 66142252.

It is not an unprimeable number, because it can be changed into a prime (66142259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751573 + ... + 751660.

It is an arithmetic number, because the mean of its divisors is an integer number (10522638).

Almost surely, 2^66142252 is an apocalyptic number.

It is an amenable number.

66142252 is a deficient number, since it is larger than the sum of its proper divisors (60129404).

66142252 is a wasteful number, since it uses less digits than its factorization.

66142252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503248 (or 1503246 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 66142252 is about 8132.7886976117. The cubic root of 66142252 is about 404.4141343622.

The spelling of 66142252 in words is "sixty-six million, one hundred forty-two thousand, two hundred fifty-two".