75660383681 has 2 divisors, whose sum is σ = 75660383682. Its totient is φ = 75660383680.

The previous prime is 75660383671. The next prime is 75660383693. The reversal of 75660383681 is 18638306657.

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., 75526032400 + 134351281 = 274820^2 + 11591^2 .

It is a cyclic number.

It is not a de Polignac number, because 75660383681 - 2³⁴ = 58480514497 is a prime.

It is a super-2 number, since 2×75660383681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (75660383611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37830191840 + 37830191841.

It is an arithmetic number, because the mean of its divisors is an integer number (37830191841).

Almost surely, 2^75660383681 is an apocalyptic number.

It is an amenable number.

75660383681 is a deficient number, since it is larger than the sum of its proper divisors (1).

75660383681 is an equidigital number, since it uses as much as digits as its factorization.

75660383681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 75660383681 in words is "seventy-five billion, six hundred sixty million, three hundred eighty-three thousand, six hundred eighty-one".