667115558 has 16 divisors (see below), whose sum is σ = 1021474800. Its totient is φ = 326647776.

The previous prime is 667115557. The next prime is 667115563. The reversal of 667115558 is 855511766.

It is a happy number.

It is a super-3 number, since 3×667115558³ (a number of 27 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667115557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53393 + ... + 64691.

It is an arithmetic number, because the mean of its divisors is an integer number (63842175).

Almost surely, 2^667115558 is an apocalyptic number.

667115558 is a deficient number, since it is larger than the sum of its proper divisors (354359242).

667115558 is a wasteful number, since it uses less digits than its factorization.

667115558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11911.

The product of its digits is 252000, while the sum is 44.

The square root of 667115558 is about 25828.5802552134. The cubic root of 667115558 is about 873.7764920952.

The spelling of 667115558 in words is "six hundred sixty-seven million, one hundred fifteen thousand, five hundred fifty-eight".