663552361 has 4 divisors (see below), whose sum is σ = 664973712. Its totient is φ = 662131012.

The previous prime is 663552359. The next prime is 663552367. The reversal of 663552361 is 163255366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 163255366 = 2 ⋅81627683.

It is a cyclic number.

It is not a de Polignac number, because 663552361 - 2¹ = 663552359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 663552361.

It is not an unprimeable number, because it can be changed into a prime (663552367) by changing a digit.

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, 709975 + ... + 710908.

It is an arithmetic number, because the mean of its divisors is an integer number (166243428).

Almost surely, 2^663552361 is an apocalyptic number.

It is an amenable number.

663552361 is a deficient number, since it is larger than the sum of its proper divisors (1421351).

663552361 is a wasteful number, since it uses less digits than its factorization.

663552361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421350.

The product of its digits is 97200, while the sum is 37.

The square root of 663552361 is about 25759.5101079194. The cubic root of 663552361 is about 872.2180427337.

It can be divided in two parts, 6635 and 52361, that added together give a triangular number (58996 = T₃₄₃).

The spelling of 663552361 in words is "six hundred sixty-three million, five hundred fifty-two thousand, three hundred sixty-one".