67271240689 has 9 divisors (see below), whose sum is σ = 67539714123. Its totient is φ = 67003833312.

The previous prime is 67271240683. The next prime is 67271240731. The reversal of 67271240689 is 98604217276.

The square root of 67271240689 is 259367.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 7543791025 + 59727449664 = 86855^2 + 244392^2 .

It is not a de Polignac number, because 67271240689 - 2²³ = 67262852081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67271240683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 112305612 + ... + 112306210.

Almost surely, 2^67271240689 is an apocalyptic number.

67271240689 is the 259367-th square number.

67271240689 is the 129684-th centered octagonal number.

It is an amenable number.

67271240689 is a deficient number, since it is larger than the sum of its proper divisors (268473434).

67271240689 is an frugal number, since it uses more digits than its factorization.

67271240689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064 (or 1032 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 67271240689 in words is "sixty-seven billion, two hundred seventy-one million, two hundred forty thousand, six hundred eighty-nine".