66271311317266 has 12 divisors (see below), whose sum is σ = 109265509155726. Its totient is φ = 30123323325920.

The previous prime is 66271311317087. The next prime is 66271311317287.

66271311317266 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 43405499241225 + 22865812076041 = 6588285^2 + 4781821^2 .

It is a super-3 number, since 3×66271311317266³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 136924196695 + ... + 136924197178.

Almost surely, 2^{66271311317266} is an apocalyptic number.

66271311317266 is a deficient number, since it is larger than the sum of its proper divisors (42994197838460).

66271311317266 is a wasteful number, since it uses less digits than its factorization.

66271311317266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273848393897 (or 273848393886 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 52.

The spelling of 66271311317266 in words is "sixty-six trillion, two hundred seventy-one billion, three hundred eleven million, three hundred seventeen thousand, two hundred sixty-six".