663045445 has 4 divisors (see below), whose sum is σ = 795654540. Its totient is φ = 530436352.

The previous prime is 663045433. The next prime is 663045463. The reversal of 663045445 is 544540366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 224310529 + 438734916 = 14977^2 + 20946^2 .

It is a cyclic number.

It is not a de Polignac number, because 663045445 - 2¹⁹ = 662521157 is a prime.

It is a congruent number.

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, 66304540 + ... + 66304549.

It is an arithmetic number, because the mean of its divisors is an integer number (198913635).

Almost surely, 2^663045445 is an apocalyptic number.

It is an amenable number.

663045445 is a deficient number, since it is larger than the sum of its proper divisors (132609095).

663045445 is a wasteful number, since it uses less digits than its factorization.

663045445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132609094.

The product of its (nonzero) digits is 172800, while the sum is 37.

The square root of 663045445 is about 25749.6688328219. The cubic root of 663045445 is about 871.9958779404.

The spelling of 663045445 in words is "six hundred sixty-three million, forty-five thousand, four hundred forty-five".