755566665557 has 8 divisors (see below), whose sum is σ = 824374832832. Its totient is φ = 686778546400.

The previous prime is 755566665517. The next prime is 755566665559.

It is a happy number.

755566665557 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 755566665557 - 2¹⁰ = 755566664533 is a prime.

It is a super-2 number, since 2×755566665557² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (755566665559) 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, 4933169 + ... + 5084022.

It is an arithmetic number, because the mean of its divisors is an integer number (103046854104).

Almost surely, 2^755566665557 is an apocalyptic number.

It is an amenable number.

755566665557 is a deficient number, since it is larger than the sum of its proper divisors (68808167275).

755566665557 is a wasteful number, since it uses less digits than its factorization.

755566665557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10024059.

The product of its digits is 992250000, while the sum is 68.

The spelling of 755566665557 in words is "seven hundred fifty-five billion, five hundred sixty-six million, six hundred sixty-five thousand, five hundred fifty-seven".