75169317661 has 2 divisors, whose sum is σ = 75169317662. Its totient is φ = 75169317660.

The previous prime is 75169317617. The next prime is 75169317709. The reversal of 75169317661 is 16671396157.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68019769636 + 7149548025 = 260806^2 + 84555^2 .

It is a cyclic number.

It is not a de Polignac number, because 75169317661 - 2¹³ = 75169309469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75169317599 and 75169317608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75169317611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37584658830 + 37584658831.

It is an arithmetic number, because the mean of its divisors is an integer number (37584658831).

Almost surely, 2^75169317661 is an apocalyptic number.

It is an amenable number.

75169317661 is a deficient number, since it is larger than the sum of its proper divisors (1).

75169317661 is an equidigital number, since it uses as much as digits as its factorization.

75169317661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1428840, while the sum is 52.

The spelling of 75169317661 in words is "seventy-five billion, one hundred sixty-nine million, three hundred seventeen thousand, six hundred sixty-one".