75666066657 has 8 divisors (see below), whose sum is σ = 101051076960. Its totient is φ = 50362550400.

The previous prime is 75666066643. The next prime is 75666066731.

75666066657 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 75666066657 - 2¹⁶ = 75666001121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75666066657.

It is not an unprimeable number, because it can be changed into a prime (75666066757) 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, 20371344 + ... + 20375057.

It is an arithmetic number, because the mean of its divisors is an integer number (12631384620).

Almost surely, 2^75666066657 is an apocalyptic number.

It is an amenable number.

75666066657 is a deficient number, since it is larger than the sum of its proper divisors (25385010303).

75666066657 is a wasteful number, since it uses less digits than its factorization.

75666066657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40747023.

The product of its (nonzero) digits is 57153600, while the sum is 60.

The spelling of 75666066657 in words is "seventy-five billion, six hundred sixty-six million, sixty-six thousand, six hundred fifty-seven".