663363661366 has 64 divisors (see below), whose sum is σ = 1236613201920. Its totient is φ = 260446661280.

The previous prime is 663363661357. The next prime is 663363661369. The reversal of 663363661366 is 663166363366.

663363661366 is a nontrivial binomial coefficient, being equal to C(1151837, 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663363661369) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10912131 + ... + 10972753.

It is an arithmetic number, because the mean of its divisors is an integer number (19322081280).

Almost surely, 2^663363661366 is an apocalyptic number.

663363661366 is the 1151836-th triangular number.

663363661366 is the 383946-th centered nonagonal number.

663363661366 is a deficient number, since it is larger than the sum of its proper divisors (573249540554).

663363661366 is a wasteful number, since it uses less digits than its factorization.

663363661366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62009.

The product of its digits is 22674816, while the sum is 55.

The spelling of 663363661366 in words is "six hundred sixty-three billion, three hundred sixty-three million, six hundred sixty-one thousand, three hundred sixty-six".