663143554 has 8 divisors (see below), whose sum is σ = 994928508. Its totient is φ = 331500720.

The previous prime is 663143543. The next prime is 663143557. The reversal of 663143554 is 455341366.

It can be written as a sum of positive squares in 2 ways, for example, as 523265625 + 139877929 = 22875^2 + 11827^2 .

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

It is not an unprimeable number, because it can be changed into a prime (663143557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22977 + ... + 43060.

Almost surely, 2^663143554 is an apocalyptic number.

663143554 is a deficient number, since it is larger than the sum of its proper divisors (331784954).

663143554 is a wasteful number, since it uses less digits than its factorization.

663143554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71060.

The product of its digits is 129600, while the sum is 37.

The square root of 663143554 is about 25751.5738159826. The cubic root of 663143554 is about 872.0388847584.

The spelling of 663143554 in words is "six hundred sixty-three million, one hundred forty-three thousand, five hundred fifty-four".