7701331681 has 2 divisors, whose sum is σ = 7701331682. Its totient is φ = 7701331680.

The previous prime is 7701331667. The next prime is 7701331717. The reversal of 7701331681 is 1861331077.

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., 6872410000 + 828921681 = 82900^2 + 28791^2 .

It is an emirp because it is prime and its reverse (1861331077) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7701331681 - 2³¹ = 5553848033 is a prime.

It is a super-2 number, since 2×7701331681² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7701331681.

It is not a weakly prime, because it can be changed into another prime (7701331481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3850665840 + 3850665841.

It is an arithmetic number, because the mean of its divisors is an integer number (3850665841).

Almost surely, 2^7701331681 is an apocalyptic number.

It is an amenable number.

7701331681 is a deficient number, since it is larger than the sum of its proper divisors (1).

7701331681 is an equidigital number, since it uses as much as digits as its factorization.

7701331681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 7701331681 is about 87757.2315025947. The cubic root of 7701331681 is about 1974.7946530934.

The spelling of 7701331681 in words is "seven billion, seven hundred one million, three hundred thirty-one thousand, six hundred eighty-one".