75720566616 has 32 divisors (see below), whose sum is σ = 189712076400. Its totient is φ = 25185434240.

The previous prime is 75720566599. The next prime is 75720566617. The reversal of 75720566616 is 61666502757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75720566617) 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, 3410871 + ... + 3432998.

Almost surely, 2^75720566616 is an apocalyptic number.

It is an amenable number.

75720566616 is an abundant number, since it is smaller than the sum of its proper divisors (113991509784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75720566616 is a wasteful number, since it uses less digits than its factorization.

75720566616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6844339 (or 6844335 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 51.

The spelling of 75720566616 in words is "seventy-five billion, seven hundred twenty million, five hundred sixty-six thousand, six hundred sixteen".