161266106 has 4 divisors (see below), whose sum is σ = 241899162. Its totient is φ = 80633052.

The previous prime is 161266103. The next prime is 161266111. The reversal of 161266106 is 601662161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 601662161 = 89 ⋅6760249.

It can be written as a sum of positive squares in only one way, i.e., 138274081 + 22992025 = 11759^2 + 4795^2 .

It is not an unprimeable number, because it can be changed into a prime (161266103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40316525 + ... + 40316528.

Almost surely, 2^161266106 is an apocalyptic number.

161266106 is a deficient number, since it is larger than the sum of its proper divisors (80633056).

161266106 is an equidigital number, since it uses as much as digits as its factorization.

161266106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80633055.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 161266106 is about 12699.0592564961. The cubic root of 161266106 is about 544.3117378658.

The spelling of 161266106 in words is "one hundred sixty-one million, two hundred sixty-six thousand, one hundred six".