66234520 has 32 divisors (see below), whose sum is σ = 162576720. Its totient is φ = 24085120.

The previous prime is 66234481. The next prime is 66234527. The reversal of 66234520 is 2543266.

It is a happy number.

66234520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66234527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74827 + ... + 75706.

Almost surely, 2^66234520 is an apocalyptic number.

It is an amenable number.

66234520 is an abundant number, since it is smaller than the sum of its proper divisors (96342200).

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

66234520 is a wasteful number, since it uses less digits than its factorization.

66234520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150555 (or 150551 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 66234520 is about 8138.4593136539. The cubic root of 66234520 is about 404.6020986588.

Adding to 66234520 its reverse (2543266), we get a palindrome (68777786).

The spelling of 66234520 in words is "sixty-six million, two hundred thirty-four thousand, five hundred twenty".