75550553 has 8 divisors (see below), whose sum is σ = 81456648. Its totient is φ = 69657984.

The previous prime is 75550543. The next prime is 75550591. The reversal of 75550553 is 35505557.

It can be written as a sum of positive squares in 4 ways, for example, as 18593344 + 56957209 = 4312^2 + 7547^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75550553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75550523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10301 + ... + 16037.

It is an arithmetic number, because the mean of its divisors is an integer number (10182081).

Almost surely, 2^75550553 is an apocalyptic number.

It is an amenable number.

75550553 is a deficient number, since it is larger than the sum of its proper divisors (5906095).

75550553 is a wasteful number, since it uses less digits than its factorization.

75550553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6763.

The product of its (nonzero) digits is 65625, while the sum is 35.

The square root of 75550553 is about 8691.9821099678. The cubic root of 75550553 is about 422.7457165744.

The spelling of 75550553 in words is "seventy-five million, five hundred fifty thousand, five hundred fifty-three".