180663946 has 8 divisors (see below), whose sum is σ = 271052964. Its totient is φ = 90312960.

The previous prime is 180663937. The next prime is 180663953. The reversal of 180663946 is 649366081.

It can be written as a sum of positive squares in 2 ways, for example, as 148571721 + 32092225 = 12189^2 + 5665^2 .

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

It is a super-2 number, since 2×180663946² = 65278922768581832, which contains 22 as substring.

It is an unprimeable number.

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, 13696 + ... + 23428.

Almost surely, 2^180663946 is an apocalyptic number.

180663946 is a deficient number, since it is larger than the sum of its proper divisors (90389018).

180663946 is an equidigital number, since it uses as much as digits as its factorization.

180663946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19016.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 180663946 is about 13441.1288960414. The cubic root of 180663946 is about 565.3149845187.

The spelling of 180663946 in words is "one hundred eighty million, six hundred sixty-three thousand, nine hundred forty-six".