74516681 has 2 divisors, whose sum is σ = 74516682. Its totient is φ = 74516680.

The previous prime is 74516647. The next prime is 74516699. The reversal of 74516681 is 18661547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72931600 + 1585081 = 8540^2 + 1259^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74516681 is a prime.

It is a super-2 number, since 2×74516681² = 11105471494511522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (74516621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37258340 + 37258341.

It is an arithmetic number, because the mean of its divisors is an integer number (37258341).

Almost surely, 2^74516681 is an apocalyptic number.

It is an amenable number.

74516681 is a deficient number, since it is larger than the sum of its proper divisors (1).

74516681 is an equidigital number, since it uses as much as digits as its factorization.

74516681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 38.

The square root of 74516681 is about 8632.3045011167. The cubic root of 74516681 is about 420.8084974484.

The spelling of 74516681 in words is "seventy-four million, five hundred sixteen thousand, six hundred eighty-one".