166406260558 has 16 divisors (see below), whose sum is σ = 251140538880. Its totient is φ = 82692892696.

The previous prime is 166406260549. The next prime is 166406260597. The reversal of 166406260558 is 855062604661.

It is a super-3 number, since 3×166406260558³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2540463 + ... + 2605141.

It is an arithmetic number, because the mean of its divisors is an integer number (15696283680).

Almost surely, 2^166406260558 is an apocalyptic number.

166406260558 is a deficient number, since it is larger than the sum of its proper divisors (84734278322).

166406260558 is a wasteful number, since it uses less digits than its factorization.

166406260558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72551.

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 166406260558 in words is "one hundred sixty-six billion, four hundred six million, two hundred sixty thousand, five hundred fifty-eight".