166505497458 has 8 divisors (see below), whose sum is σ = 333010994928. Its totient is φ = 55501832484.

The previous prime is 166505497399. The next prime is 166505497471. The reversal of 166505497458 is 854794505661.

166505497458 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

166505497458 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13875458116 + ... + 13875458127.

It is an arithmetic number, because the mean of its divisors is an integer number (41626374366).

Almost surely, 2^166505497458 is an apocalyptic number.

166505497458 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166505497458 is a wasteful number, since it uses less digits than its factorization.

166505497458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27750916248.

The product of its (nonzero) digits is 36288000, while the sum is 60.

The spelling of 166505497458 in words is "one hundred sixty-six billion, five hundred five million, four hundred ninety-seven thousand, four hundred fifty-eight".