74860078681 has 2 divisors, whose sum is σ = 74860078682. Its totient is φ = 74860078680.

The previous prime is 74860078673. The next prime is 74860078747. The reversal of 74860078681 is 18687006847.

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., 53573268681 + 21286810000 = 231459^2 + 145900^2 .

It is a cyclic number.

It is not a de Polignac number, because 74860078681 - 2³ = 74860078673 is a prime.

It is a super-2 number, since 2×74860078681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74860078661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37430039340 + 37430039341.

It is an arithmetic number, because the mean of its divisors is an integer number (37430039341).

Almost surely, 2^74860078681 is an apocalyptic number.

It is an amenable number.

74860078681 is a deficient number, since it is larger than the sum of its proper divisors (1).

74860078681 is an equidigital number, since it uses as much as digits as its factorization.

74860078681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3612672, while the sum is 55.

The spelling of 74860078681 in words is "seventy-four billion, eight hundred sixty million, seventy-eight thousand, six hundred eighty-one".