75373341661 has 2 divisors, whose sum is σ = 75373341662. Its totient is φ = 75373341660.

The previous prime is 75373341629. The next prime is 75373341671. The reversal of 75373341661 is 16614337357.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54983215225 + 20390126436 = 234485^2 + 142794^2 .

It is an emirp because it is prime and its reverse (16614337357) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75373341661 - 2⁵ = 75373341629 is a prime.

It is a super-2 number, since 2×75373341661² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75373341671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37686670830 + 37686670831.

It is an arithmetic number, because the mean of its divisors is an integer number (37686670831).

Almost surely, 2^75373341661 is an apocalyptic number.

It is an amenable number.

75373341661 is a deficient number, since it is larger than the sum of its proper divisors (1).

75373341661 is an equidigital number, since it uses as much as digits as its factorization.

75373341661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 46.

The spelling of 75373341661 in words is "seventy-five billion, three hundred seventy-three million, three hundred forty-one thousand, six hundred sixty-one".