76193368661 has 4 divisors (see below), whose sum is σ = 76409214252. Its totient is φ = 75977523072.

The previous prime is 76193368649. The next prime is 76193368663. The reversal of 76193368661 is 16686339167.

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 39718098436 + 36475270225 = 199294^2 + 190985^2 .

It is a cyclic number.

It is not a de Polignac number, because 76193368661 - 2³⁰ = 75119626837 is a prime.

It is a super-2 number, since 2×76193368661² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 76193368597 and 76193368606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76193368663) 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, 107922266 + ... + 107922971.

It is an arithmetic number, because the mean of its divisors is an integer number (19102303563).

Almost surely, 2^76193368661 is an apocalyptic number.

It is an amenable number.

76193368661 is a deficient number, since it is larger than the sum of its proper divisors (215845591).

76193368661 is a wasteful number, since it uses less digits than its factorization.

76193368661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215845590.

The product of its digits is 5878656, while the sum is 56.

The spelling of 76193368661 in words is "seventy-six billion, one hundred ninety-three million, three hundred sixty-eight thousand, six hundred sixty-one".