66257255275267 has 8 divisors (see below), whose sum is σ = 75723676759136. Its totient is φ = 56791108616832.

The previous prime is 66257255275243. The next prime is 66257255275301. The reversal of 66257255275267 is 76257255275266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66257255275267 - 2¹⁵ = 66257255242499 is a prime.

It is a super-2 number, since 2×66257255275267² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66257255245267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68189478 + ... + 69154315.

It is an arithmetic number, because the mean of its divisors is an integer number (9465459594892).

Almost surely, 2^{66257255275267} is an apocalyptic number.

66257255275267 is a deficient number, since it is larger than the sum of its proper divisors (9466421483869).

66257255275267 is a wasteful number, since it uses less digits than its factorization.

66257255275267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137412717.

The product of its digits is 740880000, while the sum is 67.

Subtracting 66257255275267 from its reverse (76257255275266), we obtain a palindrome (9999999999999).

The spelling of 66257255275267 in words is "sixty-six trillion, two hundred fifty-seven billion, two hundred fifty-five million, two hundred seventy-five thousand, two hundred sixty-seven".