66013268 has 6 divisors (see below), whose sum is σ = 115523226. Its totient is φ = 33006632.

The previous prime is 66013237. The next prime is 66013273. The reversal of 66013268 is 86231066.

It can be written as a sum of positive squares in only one way, i.e., 48052624 + 17960644 = 6932^2 + 4238^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8251655 + ... + 8251662.

It is an arithmetic number, because the mean of its divisors is an integer number (19253871).

Almost surely, 2^66013268 is an apocalyptic number.

It is an amenable number.

66013268 is a deficient number, since it is larger than the sum of its proper divisors (49509958).

66013268 is a wasteful number, since it uses less digits than its factorization.

66013268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16503321 (or 16503319 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 66013268 is about 8124.8549525515. The cubic root of 66013268 is about 404.1510806380.

The spelling of 66013268 in words is "sixty-six million, thirteen thousand, two hundred sixty-eight".