677324611681 has 2 divisors, whose sum is σ = 677324611682. Its totient is φ = 677324611680.

The previous prime is 677324611661. The next prime is 677324611709. The reversal of 677324611681 is 186116423776.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 510853267600 + 166471344081 = 714740^2 + 408009^2 .

It is a cyclic number.

It is not a de Polignac number, because 677324611681 - 2¹³ = 677324603489 is a prime.

It is a super-2 number, since 2×677324611681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (677324611661) 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 as a sum of consecutive naturals, namely, 338662305840 + 338662305841.

It is an arithmetic number, because the mean of its divisors is an integer number (338662305841).

Almost surely, 2^677324611681 is an apocalyptic number.

It is an amenable number.

677324611681 is a deficient number, since it is larger than the sum of its proper divisors (1).

677324611681 is an equidigital number, since it uses as much as digits as its factorization.

677324611681 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 677324611681 in words is "six hundred seventy-seven billion, three hundred twenty-four million, six hundred eleven thousand, six hundred eighty-one".