166651054 has 16 divisors (see below), whose sum is σ = 261141408. Its totient is φ = 79612192.

The previous prime is 166651007. The next prime is 166651057. The reversal of 166651054 is 450156661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166651057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57324 + ... + 60160.

It is an arithmetic number, because the mean of its divisors is an integer number (16321338).

Almost surely, 2^166651054 is an apocalyptic number.

166651054 is a deficient number, since it is larger than the sum of its proper divisors (94490354).

166651054 is a wasteful number, since it uses less digits than its factorization.

166651054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 166651054 is about 12909.3397972166. The cubic root of 166651054 is about 550.3040236493.

The spelling of 166651054 in words is "one hundred sixty-six million, six hundred fifty-one thousand, fifty-four".