663143644 has 6 divisors (see below), whose sum is σ = 1160501384. Its totient is φ = 331571820.

The previous prime is 663143641. The next prime is 663143653. The reversal of 663143644 is 446341366.

663143644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663143641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82892952 + ... + 82892959.

Almost surely, 2^663143644 is an apocalyptic number.

It is an amenable number.

663143644 is a deficient number, since it is larger than the sum of its proper divisors (497357740).

663143644 is a wasteful number, since it uses less digits than its factorization.

663143644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165785915 (or 165785913 counting only the distinct ones).

The product of its digits is 124416, while the sum is 37.

The square root of 663143644 is about 25751.5755634485. The cubic root of 663143644 is about 872.0389242087.

The spelling of 663143644 in words is "six hundred sixty-three million, one hundred forty-three thousand, six hundred forty-four".