166681054 has 8 divisors (see below), whose sum is σ = 250665480. Its totient is φ = 83125896.

The previous prime is 166681049. The next prime is 166681111. The reversal of 166681054 is 450186661.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106344 + ... + 107899.

It is an arithmetic number, because the mean of its divisors is an integer number (31333185).

Almost surely, 2^166681054 is an apocalyptic number.

166681054 is a deficient number, since it is larger than the sum of its proper divisors (83984426).

166681054 is a wasteful number, since it uses less digits than its factorization.

166681054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214634.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 166681054 is about 12910.5016943572. The cubic root of 166681054 is about 550.3370430028.

The spelling of 166681054 in words is "one hundred sixty-six million, six hundred eighty-one thousand, fifty-four".