166050121 has 4 divisors (see below), whose sum is σ = 166215700. Its totient is φ = 165884544.

The previous prime is 166050109. The next prime is 166050127. The reversal of 166050121 is 121050661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121050661 = 1277 ⋅94793.

It can be written as a sum of positive squares in 2 ways, for example, as 52925625 + 113124496 = 7275^2 + 10636^2 .

It is a cyclic number.

It is not a de Polignac number, because 166050121 - 2²⁵ = 132495689 is a prime.

It is a super-2 number, since 2×166050121² = 55145285368229282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166050092 and 166050101.

It is not an unprimeable number, because it can be changed into a prime (166050127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81276 + ... + 83293.

It is an arithmetic number, because the mean of its divisors is an integer number (41553925).

Almost surely, 2^166050121 is an apocalyptic number.

It is an amenable number.

166050121 is a deficient number, since it is larger than the sum of its proper divisors (165579).

166050121 is a wasteful number, since it uses less digits than its factorization.

166050121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165578.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 166050121 is about 12886.0436519515. The cubic root of 166050121 is about 549.6417733416.

The spelling of 166050121 in words is "one hundred sixty-six million, fifty thousand, one hundred twenty-one".