663061144 has 8 divisors (see below), whose sum is σ = 1243239660. Its totient is φ = 331530568.

The previous prime is 663061129. The next prime is 663061151. The reversal of 663061144 is 441160366.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41441314 + ... + 41441329.

Almost surely, 2^663061144 is an apocalyptic number.

It is an amenable number.

663061144 is a deficient number, since it is larger than the sum of its proper divisors (580178516).

663061144 is a wasteful number, since it uses less digits than its factorization.

663061144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82882649 (or 82882645 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 663061144 is about 25749.9736698895. The cubic root of 663061144 is about 872.0027600002.

The spelling of 663061144 in words is "six hundred sixty-three million, sixty-one thousand, one hundred forty-four".