663605745 has 48 divisors (see below), whose sum is σ = 1187040960. Its totient is φ = 316243840.

The previous prime is 663605743. The next prime is 663605749. The reversal of 663605745 is 547506366.

It is not a de Polignac number, because 663605745 - 2¹ = 663605743 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 663605697 and 663605706.

It is not an unprimeable number, because it can be changed into a prime (663605743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 103987 + ... + 110183.

It is an arithmetic number, because the mean of its divisors is an integer number (24730020).

Almost surely, 2^663605745 is an apocalyptic number.

It is an amenable number.

663605745 is a deficient number, since it is larger than the sum of its proper divisors (523435215).

663605745 is a wasteful number, since it uses less digits than its factorization.

663605745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6286 (or 6275 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 42.

The square root of 663605745 is about 25760.5462869094. The cubic root of 663605745 is about 872.2414326183.

The spelling of 663605745 in words is "six hundred sixty-three million, six hundred five thousand, seven hundred forty-five".