755866668557 has 32 divisors (see below), whose sum is σ = 1016122404864. Its totient is φ = 543009355200.

The previous prime is 755866668533. The next prime is 755866668563.

755866668557 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 755866668557 - 2¹⁶ = 755866603021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (755866664557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 346268 + ... + 1277354.

It is an arithmetic number, because the mean of its divisors is an integer number (31753825152).

Almost surely, 2^755866668557 is an apocalyptic number.

755866668557 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

755866668557 is a deficient number, since it is larger than the sum of its proper divisors (260255736307).

755866668557 is a wasteful number, since it uses less digits than its factorization.

755866668557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931929.

The product of its digits is 2540160000, while the sum is 74.

The spelling of 755866668557 in words is "seven hundred fifty-five billion, eight hundred sixty-six million, six hundred sixty-eight thousand, five hundred fifty-seven".