75476561 has 2 divisors, whose sum is σ = 75476562. Its totient is φ = 75476560.

The previous prime is 75476543. The next prime is 75476563. The reversal of 75476561 is 16567457.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63504961 + 11971600 = 7969^2 + 3460^2 .

It is a cyclic number.

It is not a de Polignac number, because 75476561 - 2⁶ = 75476497 is a prime.

It is a super-2 number, since 2×75476561² = 11393422520773442, which contains 22 as substring.

Together with 75476563, 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 (75476563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37738280 + 37738281.

It is an arithmetic number, because the mean of its divisors is an integer number (37738281).

Almost surely, 2^75476561 is an apocalyptic number.

It is an amenable number.

75476561 is a deficient number, since it is larger than the sum of its proper divisors (1).

75476561 is an equidigital number, since it uses as much as digits as its factorization.

75476561 is an evil number, because the sum of its binary digits is even.

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

The square root of 75476561 is about 8687.7247309062. The cubic root of 75476561 is about 422.6076632362.

The spelling of 75476561 in words is "seventy-five million, four hundred seventy-six thousand, five hundred sixty-one".