75657641 has 2 divisors, whose sum is σ = 75657642. Its totient is φ = 75657640.

The previous prime is 75657623. The next prime is 75657643. The reversal of 75657641 is 14675657.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66896041 + 8761600 = 8179^2 + 2960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75657641 is a prime.

Together with 75657643, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (75657643) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37828820 + 37828821.

It is an arithmetic number, because the mean of its divisors is an integer number (37828821).

Almost surely, 2^75657641 is an apocalyptic number.

It is an amenable number.

75657641 is a deficient number, since it is larger than the sum of its proper divisors (1).

75657641 is an equidigital number, since it uses as much as digits as its factorization.

75657641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 41.

The square root of 75657641 is about 8698.1400885477. The cubic root of 75657641 is about 422.9453604718.

The spelling of 75657641 in words is "seventy-five million, six hundred fifty-seven thousand, six hundred forty-one".