75691369661 has 2 divisors, whose sum is σ = 75691369662. Its totient is φ = 75691369660.

The previous prime is 75691369499. The next prime is 75691369709. The reversal of 75691369661 is 16696319657.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62209837561 + 13481532100 = 249419^2 + 116110^2 .

It is an emirp because it is prime and its reverse (16696319657) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75691369661 - 2³⁴ = 58511500477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75691369661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75691369361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37845684830 + 37845684831.

It is an arithmetic number, because the mean of its divisors is an integer number (37845684831).

Almost surely, 2^75691369661 is an apocalyptic number.

It is an amenable number.

75691369661 is a deficient number, since it is larger than the sum of its proper divisors (1).

75691369661 is an equidigital number, since it uses as much as digits as its factorization.

75691369661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11022480, while the sum is 59.

The spelling of 75691369661 in words is "seventy-five billion, six hundred ninety-one million, three hundred sixty-nine thousand, six hundred sixty-one".