66131268 has 24 divisors (see below), whose sum is σ = 176350272. Its totient is φ = 18894624.

The previous prime is 66131251. The next prime is 66131287. The reversal of 66131268 is 86213166.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393555 + ... + 393722.

It is an arithmetic number, because the mean of its divisors is an integer number (7347928).

Almost surely, 2^66131268 is an apocalyptic number.

It is an amenable number.

66131268 is an abundant number, since it is smaller than the sum of its proper divisors (110219004).

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

66131268 is a wasteful number, since it uses less digits than its factorization.

66131268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787291 (or 787289 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 66131268 is about 8132.1133784521. The cubic root of 66131268 is about 404.3917466013.

The spelling of 66131268 in words is "sixty-six million, one hundred thirty-one thousand, two hundred sixty-eight".