75570707021 has 4 divisors (see below), whose sum is σ = 78176593500. Its totient is φ = 72964820544.

The previous prime is 75570706987. The next prime is 75570707063. The reversal of 75570707021 is 12070707557.

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 63207490921 + 12363216100 = 251411^2 + 111190^2 .

It is a cyclic number.

It is not a de Polignac number, because 75570707021 - 2⁶ = 75570706957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 75570707021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75570707071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1302943196 + ... + 1302943253.

It is an arithmetic number, because the mean of its divisors is an integer number (19544148375).

Almost surely, 2^75570707021 is an apocalyptic number.

It is an amenable number.

75570707021 is a deficient number, since it is larger than the sum of its proper divisors (2605886479).

75570707021 is a wasteful number, since it uses less digits than its factorization.

75570707021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2605886478.

The product of its (nonzero) digits is 120050, while the sum is 41.

The spelling of 75570707021 in words is "seventy-five billion, five hundred seventy million, seven hundred seven thousand, twenty-one".