161967266 has 8 divisors (see below), whose sum is σ = 243564060. Its totient is φ = 80779248.

The previous prime is 161967263. The next prime is 161967269. The reversal of 161967266 is 662769161.

It is a happy number.

161967266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161967263) and next prime (161967269).

It can be written as a sum of positive squares in 2 ways, for example, as 153388225 + 8579041 = 12385^2 + 2929^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (161967263) 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, 101201 + ... + 102788.

Almost surely, 2^161967266 is an apocalyptic number.

161967266 is a deficient number, since it is larger than the sum of its proper divisors (81596794).

161967266 is a wasteful number, since it uses less digits than its factorization.

161967266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204388.

The product of its digits is 163296, while the sum is 44.

The square root of 161967266 is about 12726.6360834275. The cubic root of 161967266 is about 545.0994583236.

The spelling of 161967266 in words is "one hundred sixty-one million, nine hundred sixty-seven thousand, two hundred sixty-six".