166708121 has 8 divisors (see below), whose sum is σ = 168218400. Its totient is φ = 165202560.

The previous prime is 166708097. The next prime is 166708123. The reversal of 166708121 is 121807661.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 166708121 - 2⁶ = 166708057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166708123) 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, 128486 + ... + 129776.

It is an arithmetic number, because the mean of its divisors is an integer number (21027300).

Almost surely, 2^166708121 is an apocalyptic number.

It is an amenable number.

166708121 is a deficient number, since it is larger than the sum of its proper divisors (1510279).

166708121 is a wasteful number, since it uses less digits than its factorization.

166708121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 166708121 is about 12911.5499069631. The cubic root of 166708121 is about 550.3668307644.

The spelling of 166708121 in words is "one hundred sixty-six million, seven hundred eight thousand, one hundred twenty-one".