74073406681 has 2 divisors, whose sum is σ = 74073406682. Its totient is φ = 74073406680.

The previous prime is 74073406679. The next prime is 74073406739. The reversal of 74073406681 is 18660437047.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51055662025 + 23017744656 = 225955^2 + 151716^2 .

It is a cyclic number.

It is not a de Polignac number, because 74073406681 - 2¹ = 74073406679 is a prime.

It is a super-2 number, since 2×74073406681² (a number of 23 digits) contains 22 as substring.

Together with 74073406679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (74073406651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37036703340 + 37036703341.

It is an arithmetic number, because the mean of its divisors is an integer number (37036703341).

Almost surely, 2^74073406681 is an apocalyptic number.

It is an amenable number.

74073406681 is a deficient number, since it is larger than the sum of its proper divisors (1).

74073406681 is an equidigital number, since it uses as much as digits as its factorization.

74073406681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 74073406681 in words is "seventy-four billion, seventy-three million, four hundred six thousand, six hundred eighty-one".