66081268 has 12 divisors (see below), whose sum is σ = 126155232. Its totient is φ = 30036920.

The previous prime is 66081263. The next prime is 66081283. The reversal of 66081268 is 86218066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66081263) 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, 750880 + ... + 750967.

It is an arithmetic number, because the mean of its divisors is an integer number (10512936).

Almost surely, 2^66081268 is an apocalyptic number.

It is an amenable number.

66081268 is a deficient number, since it is larger than the sum of its proper divisors (60073964).

66081268 is a wasteful number, since it uses less digits than its factorization.

66081268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501862 (or 1501860 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 66081268 is about 8129.0385655377. The cubic root of 66081268 is about 404.2898044797.

The spelling of 66081268 in words is "sixty-six million, eighty-one thousand, two hundred sixty-eight".