75856372661 has 4 divisors (see below), whose sum is σ = 75897803424. Its totient is φ = 75814941900.

The previous prime is 75856372651. The next prime is 75856372693. The reversal of 75856372661 is 16627365857.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 75856372661 - 2³⁰ = 74782630837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75856372597 and 75856372606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75856372651) 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, 20712635 + ... + 20716296.

It is an arithmetic number, because the mean of its divisors is an integer number (18974450856).

Almost surely, 2^75856372661 is an apocalyptic number.

It is an amenable number.

75856372661 is a deficient number, since it is larger than the sum of its proper divisors (41430763).

75856372661 is a wasteful number, since it uses less digits than its factorization.

75856372661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41430762.

The product of its digits is 12700800, while the sum is 56.

The spelling of 75856372661 in words is "seventy-five billion, eight hundred fifty-six million, three hundred seventy-two thousand, six hundred sixty-one".