663532645 has 8 divisors (see below), whose sum is σ = 796515480. Its totient is φ = 530641920.

The previous prime is 663532637. The next prime is 663532651. The reversal of 663532645 is 546235366.

663532645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 76003524 + 587529121 = 8718^2 + 24239^2 .

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

It is not a de Polignac number, because 663532645 - 2³ = 663532637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 663532598 and 663532607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6036 + ... + 36925.

It is an arithmetic number, because the mean of its divisors is an integer number (99564435).

Almost surely, 2^663532645 is an apocalyptic number.

It is an amenable number.

663532645 is a deficient number, since it is larger than the sum of its proper divisors (132982835).

663532645 is a wasteful number, since it uses less digits than its factorization.

663532645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46055.

The product of its digits is 388800, while the sum is 40.

The square root of 663532645 is about 25759.1274114633. The cubic root of 663532645 is about 872.2094039675.

The spelling of 663532645 in words is "six hundred sixty-three million, five hundred thirty-two thousand, six hundred forty-five".