663144306 has 32 divisors (see below), whose sum is σ = 1471392000. Its totient is φ = 197545680.

The previous prime is 663144277. The next prime is 663144311. The reversal of 663144306 is 603441366.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81256 + ... + 89043.

It is an arithmetic number, because the mean of its divisors is an integer number (45981000).

Almost surely, 2^663144306 is an apocalyptic number.

663144306 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

663144306 is an abundant number, since it is smaller than the sum of its proper divisors (808247694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663144306 is a wasteful number, since it uses less digits than its factorization.

663144306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170374.

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 663144306 is about 25751.5884170278. The cubic root of 663144306 is about 872.0392143869.

The spelling of 663144306 in words is "six hundred sixty-three million, one hundred forty-four thousand, three hundred six".