75108661 has 2 divisors, whose sum is σ = 75108662. Its totient is φ = 75108660.

The previous prime is 75108641. The next prime is 75108673. The reversal of 75108661 is 16680157.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39765636 + 35343025 = 6306^2 + 5945^2 .

It is a cyclic number.

It is not a de Polignac number, because 75108661 - 2⁹ = 75108149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75108641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37554330 + 37554331.

It is an arithmetic number, because the mean of its divisors is an integer number (37554331).

Almost surely, 2^75108661 is an apocalyptic number.

It is an amenable number.

75108661 is a deficient number, since it is larger than the sum of its proper divisors (1).

75108661 is an equidigital number, since it uses as much as digits as its factorization.

75108661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 75108661 is about 8666.5253129498. The cubic root of 75108661 is about 421.9198971221.

The spelling of 75108661 in words is "seventy-five million, one hundred eight thousand, six hundred sixty-one".