663606136 has 8 divisors (see below), whose sum is σ = 1244261520. Its totient is φ = 331803064.

The previous prime is 663606133. The next prime is 663606149. The reversal of 663606136 is 631606366.

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

It is a junction number, because it is equal to n+sod(n) for n = 663606095 and 663606104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663606131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41475376 + ... + 41475391.

It is an arithmetic number, because the mean of its divisors is an integer number (155532690).

Almost surely, 2^663606136 is an apocalyptic number.

It is an amenable number.

663606136 is a deficient number, since it is larger than the sum of its proper divisors (580655384).

663606136 is a wasteful number, since it uses less digits than its factorization.

663606136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82950773 (or 82950769 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 37.

The square root of 663606136 is about 25760.5538760330. The cubic root of 663606136 is about 872.2416039280.

The spelling of 663606136 in words is "six hundred sixty-three million, six hundred six thousand, one hundred thirty-six".