671152681 has 2 divisors, whose sum is σ = 671152682. Its totient is φ = 671152680.

The previous prime is 671152679. The next prime is 671152711. The reversal of 671152681 is 186251176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 620458281 + 50694400 = 24909^2 + 7120^2 .

It is a cyclic number.

It is not a de Polignac number, because 671152681 - 2¹ = 671152679 is a prime.

It is a super-2 number, since 2×671152681² = 900891842426975522, which contains 22 as substring.

Together with 671152679, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 671152681.

It is not a weakly prime, because it can be changed into another prime (671152381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335576340 + 335576341.

It is an arithmetic number, because the mean of its divisors is an integer number (335576341).

Almost surely, 2^671152681 is an apocalyptic number.

It is an amenable number.

671152681 is a deficient number, since it is larger than the sum of its proper divisors (1).

671152681 is an equidigital number, since it uses as much as digits as its factorization.

671152681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 671152681 is about 25906.6146186645. The cubic root of 671152681 is about 875.5355332820.

It can be divided in two parts, 67115 and 2681, that added together give a palindrome (69796).

The spelling of 671152681 in words is "six hundred seventy-one million, one hundred fifty-two thousand, six hundred eighty-one".