75559081 has 4 divisors (see below), whose sum is σ = 81371332. Its totient is φ = 69746832.

The previous prime is 75559073. The next prime is 75559087. The reversal of 75559081 is 18095557.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10208025 + 65351056 = 3195^2 + 8084^2 .

It is a cyclic number.

It is not a de Polignac number, because 75559081 - 2³ = 75559073 is a prime.

It is a super-3 number, since 3×75559081³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75559087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2906106 + ... + 2906131.

It is an arithmetic number, because the mean of its divisors is an integer number (20342833).

Almost surely, 2^75559081 is an apocalyptic number.

It is an amenable number.

75559081 is a deficient number, since it is larger than the sum of its proper divisors (5812251).

75559081 is a wasteful number, since it uses less digits than its factorization.

75559081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5812250.

The product of its (nonzero) digits is 63000, while the sum is 40.

The square root of 75559081 is about 8692.4726631724. The cubic root of 75559081 is about 422.7616222150.

The spelling of 75559081 in words is "seventy-five million, five hundred fifty-nine thousand, eighty-one".