755666557 has 8 divisors (see below), whose sum is σ = 762078240. Its totient is φ = 749264880.

The previous prime is 755666501. The next prime is 755666599.

755666557 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 a de Polignac number, because none of the positive numbers 2^k-755666557 is a prime.

It is a super-3 number, since 3×755666557³ (a number of 28 digits) contains 333 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 (755666057) 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, 264378 + ... + 267220.

It is an arithmetic number, because the mean of its divisors is an integer number (95259780).

Almost surely, 2^755666557 is an apocalyptic number.

It is an amenable number.

755666557 is a deficient number, since it is larger than the sum of its proper divisors (6411683).

755666557 is a wasteful number, since it uses less digits than its factorization.

755666557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003.

The product of its digits is 6615000, while the sum is 52.

The square root of 755666557 is about 27489.3898986500. The cubic root of 755666557 is about 910.8427394151.

The spelling of 755666557 in words is "seven hundred fifty-five million, six hundred sixty-six thousand, five hundred fifty-seven".