161066567 has 4 divisors (see below), whose sum is σ = 161233416. Its totient is φ = 160899720.

The previous prime is 161066557. The next prime is 161066579. The reversal of 161066567 is 765660161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161066567 - 2¹⁰ = 161065543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161066567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161066557) 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, 81968 + ... + 83909.

It is an arithmetic number, because the mean of its divisors is an integer number (40308354).

Almost surely, 2^161066567 is an apocalyptic number.

161066567 is a deficient number, since it is larger than the sum of its proper divisors (166849).

161066567 is an equidigital number, since it uses as much as digits as its factorization.

161066567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166848.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 161066567 is about 12691.2003766389. The cubic root of 161066567 is about 544.0871479021.

The spelling of 161066567 in words is "one hundred sixty-one million, sixty-six thousand, five hundred sixty-seven".