450020666 has 8 divisors (see below), whose sum is σ = 698308020. Its totient is φ = 217251328.

The previous prime is 450020663. The next prime is 450020713. The reversal of 450020666 is 666020054.

It can be written as a sum of positive squares in 2 ways, for example, as 426216025 + 23804641 = 20645^2 + 4879^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (450020663) 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, 3879431 + ... + 3879546.

Almost surely, 2^450020666 is an apocalyptic number.

450020666 is a deficient number, since it is larger than the sum of its proper divisors (248287354).

450020666 is a wasteful number, since it uses less digits than its factorization.

450020666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7759008.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 450020666 is about 21213.6905322954. The cubic root of 450020666 is about 766.3211629923.

The spelling of 450020666 in words is "four hundred fifty million, twenty thousand, six hundred sixty-six".