66013263 has 18 divisors (see below), whose sum is σ = 96291624. Its totient is φ = 43578984.

The previous prime is 66013237. The next prime is 66013273. The reversal of 66013263 is 36231066.

It is not a de Polignac number, because 66013263 - 2⁸ = 66013007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66013273) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 250870 + ... + 251132.

Almost surely, 2^66013263 is an apocalyptic number.

66013263 is a deficient number, since it is larger than the sum of its proper divisors (30278361).

66013263 is a wasteful number, since it uses less digits than its factorization.

66013263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 66013263 is about 8124.8546448537. The cubic root of 66013263 is about 404.1510704342.

The spelling of 66013263 in words is "sixty-six million, thirteen thousand, two hundred sixty-three".