855566665558 has 8 divisors (see below), whose sum is σ = 1400018180040. Its totient is φ = 388893938880.

The previous prime is 855566665531. The next prime is 855566665559.

855566665558 is nontrivially palindromic in base 10.

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

It is a super-3 number, since 3×855566665558³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855566665559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19444696923 + ... + 19444696966.

It is an arithmetic number, because the mean of its divisors is an integer number (175002272505).

Almost surely, 2^855566665558 is an apocalyptic number.

855566665558 is a deficient number, since it is larger than the sum of its proper divisors (544451514482).

855566665558 is a wasteful number, since it uses less digits than its factorization.

855566665558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38889393902.

The product of its digits is 1296000000, while the sum is 70.

The spelling of 855566665558 in words is "eight hundred fifty-five billion, five hundred sixty-six million, six hundred sixty-five thousand, five hundred fifty-eight".