75853975661 has 4 divisors (see below), whose sum is σ = 76893071292. Its totient is φ = 74814880032.

The previous prime is 75853975649. The next prime is 75853975679. The reversal of 75853975661 is 16657935857.

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 36225508900 + 39628466761 = 190330^2 + 199069^2 .

It is a cyclic number.

It is not a de Polignac number, because 75853975661 - 2¹⁴ = 75853959277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75853975594 and 75853975603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75853975601) 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, 519547706 + ... + 519547851.

It is an arithmetic number, because the mean of its divisors is an integer number (19223267823).

Almost surely, 2^75853975661 is an apocalyptic number.

It is an amenable number.

75853975661 is a deficient number, since it is larger than the sum of its proper divisors (1039095631).

75853975661 is a wasteful number, since it uses less digits than its factorization.

75853975661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039095630.

The product of its digits is 47628000, while the sum is 62.

The spelling of 75853975661 in words is "seventy-five billion, eight hundred fifty-three million, nine hundred seventy-five thousand, six hundred sixty-one".