166354105 has 4 divisors (see below), whose sum is σ = 199624932. Its totient is φ = 133083280.

The previous prime is 166354087. The next prime is 166354117. The reversal of 166354105 is 501453661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501453661 = 67 ⋅7484383.

It can be written as a sum of positive squares in 2 ways, for example, as 81198121 + 85155984 = 9011^2 + 9228^2 .

It is not a de Polignac number, because 166354105 - 2¹⁷ = 166223033 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian 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, 16635406 + ... + 16635415.

It is an arithmetic number, because the mean of its divisors is an integer number (49906233).

Almost surely, 2^166354105 is an apocalyptic number.

It is an amenable number.

166354105 is a deficient number, since it is larger than the sum of its proper divisors (33270827).

166354105 is an equidigital number, since it uses as much as digits as its factorization.

166354105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33270826.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 166354105 is about 12897.8333451786. The cubic root of 166354105 is about 549.9769742427.

The spelling of 166354105 in words is "one hundred sixty-six million, three hundred fifty-four thousand, one hundred five".