75030661 has 2 divisors, whose sum is σ = 75030662. Its totient is φ = 75030660.

The previous prime is 75030607. The next prime is 75030667. The reversal of 75030661 is 16603057.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62710561 + 12320100 = 7919^2 + 3510^2 .

It is a cyclic number.

It is not a de Polignac number, because 75030661 - 2⁹ = 75030149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75030667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37515330 + 37515331.

It is an arithmetic number, because the mean of its divisors is an integer number (37515331).

Almost surely, 2^75030661 is an apocalyptic number.

It is an amenable number.

75030661 is a deficient number, since it is larger than the sum of its proper divisors (1).

75030661 is an equidigital number, since it uses as much as digits as its factorization.

75030661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 75030661 is about 8662.0240706200. The cubic root of 75030661 is about 421.7737925747.

The spelling of 75030661 in words is "seventy-five million, thirty thousand, six hundred sixty-one".