161166105 has 24 divisors (see below), whose sum is σ = 289703232. Its totient is φ = 85954608.

The previous prime is 161166101. The next prime is 161166127. The reversal of 161166105 is 501661161.

161166105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161166105 - 2² = 161166101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (161166101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65109 + ... + 67538.

It is an arithmetic number, because the mean of its divisors is an integer number (12070968).

Almost surely, 2^161166105 is an apocalyptic number.

161166105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161166105 is a deficient number, since it is larger than the sum of its proper divisors (128537127).

161166105 is an equidigital number, since it uses as much as digits as its factorization.

161166105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132667 (or 132655 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 161166105 is about 12695.1213070218. The cubic root of 161166105 is about 544.1992054923.

The spelling of 161166105 in words is "one hundred sixty-one million, one hundred sixty-six thousand, one hundred five".