161156667 has 16 divisors (see below), whose sum is σ = 245871872. Its totient is φ = 91977120.

The previous prime is 161156657. The next prime is 161156717. The reversal of 161156667 is 766651161.

It is not a de Polignac number, because 161156667 - 2⁷ = 161156539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161156627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14817 + ... + 23277.

It is an arithmetic number, because the mean of its divisors is an integer number (15366992).

Almost surely, 2^161156667 is an apocalyptic number.

161156667 is a deficient number, since it is larger than the sum of its proper divisors (84715205).

161156667 is an equidigital number, since it uses as much as digits as its factorization.

161156667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9378.

The product of its digits is 45360, while the sum is 39.

The square root of 161156667 is about 12694.7495839816. The cubic root of 161156667 is about 544.1885823894.

The spelling of 161156667 in words is "one hundred sixty-one million, one hundred fifty-six thousand, six hundred sixty-seven".