162720266 has 8 divisors (see below), whose sum is σ = 244162884. Its totient is φ = 81332640.

The previous prime is 162720253. The next prime is 162720269. The reversal of 162720266 is 662027261.

It can be written as a sum of positive squares in 2 ways, for example, as 154281241 + 8439025 = 12421^2 + 2905^2 .

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

It is a super-2 number, since 2×162720266² = 52955769934221512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (162720269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5315 + ... + 18806.

Almost surely, 2^162720266 is an apocalyptic number.

162720266 is a deficient number, since it is larger than the sum of its proper divisors (81442618).

162720266 is a wasteful number, since it uses less digits than its factorization.

162720266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27496.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 162720266 is about 12756.1854016003. The cubic root of 162720266 is about 545.9428909753.

The spelling of 162720266 in words is "one hundred sixty-two million, seven hundred twenty thousand, two hundred sixty-six".