663702049 has 8 divisors (see below), whose sum is σ = 705249288. Its totient is φ = 622433280.

The previous prime is 663702047. The next prime is 663702059. The reversal of 663702049 is 940207366.

It can be written as a sum of positive squares in 4 ways, for example, as 424071649 + 239630400 = 20593^2 + 15480^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 663702049 - 2¹ = 663702047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 663701999 and 663702017.

It is not an unprimeable number, because it can be changed into a prime (663702047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64692 + ... + 74245.

It is an arithmetic number, because the mean of its divisors is an integer number (88156161).

Almost surely, 2^663702049 is an apocalyptic number.

It is an amenable number.

663702049 is a deficient number, since it is larger than the sum of its proper divisors (41547239).

663702049 is a wasteful number, since it uses less digits than its factorization.

663702049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139235.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 663702049 is about 25762.4154341164. The cubic root of 663702049 is about 872.2836244751.

The spelling of 663702049 in words is "six hundred sixty-three million, seven hundred two thousand, forty-nine".