180722266 has 4 divisors (see below), whose sum is σ = 271083402. Its totient is φ = 90361132.

The previous prime is 180722263. The next prime is 180722273. The reversal of 180722266 is 662227081.

180722266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 662227081 = 7727 ⋅85703.

It can be written as a sum of positive squares in only one way, i.e., 111915241 + 68807025 = 10579^2 + 8295^2 .

It is not an unprimeable number, because it can be changed into a prime (180722261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45180565 + ... + 45180568.

Almost surely, 2^180722266 is an apocalyptic number.

180722266 is a deficient number, since it is larger than the sum of its proper divisors (90361136).

180722266 is an equidigital number, since it uses as much as digits as its factorization.

180722266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90361135.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 180722266 is about 13443.2981816219. The cubic root of 180722266 is about 565.3758076172.

The spelling of 180722266 in words is "one hundred eighty million, seven hundred twenty-two thousand, two hundred sixty-six".