66271306280831 has 4 divisors (see below), whose sum is σ = 66299423086872. Its totient is φ = 66243189474792.

The previous prime is 66271306280827. The next prime is 66271306280833. The reversal of 66271306280831 is 13808260317266.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66271306280831 - 2² = 66271306280827 is a prime.

It is a super-2 number, since 2×66271306280831² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66271306280833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14058399485 + ... + 14058404198.

It is an arithmetic number, because the mean of its divisors is an integer number (16574855771718).

Almost surely, 2^{66271306280831} is an apocalyptic number.

66271306280831 is a deficient number, since it is larger than the sum of its proper divisors (28116806041).

66271306280831 is a wasteful number, since it uses less digits than its factorization.

66271306280831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28116806040.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 66271306280831 in words is "sixty-six trillion, two hundred seventy-one billion, three hundred six million, two hundred eighty thousand, eight hundred thirty-one".