133663636 has 24 divisors (see below), whose sum is σ = 236174120. Its totient is φ = 66189312.

The previous prime is 133663631. The next prime is 133663643. The reversal of 133663636 is 636366331.

It can be written as a sum of positive squares in 4 ways, for example, as 12531600 + 121132036 = 3540^2 + 11006^2 .

It is a junction number, because it is equal to n+sod(n) for n = 133663595 and 133663604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133663631) 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 in 7 ways as a sum of consecutive naturals, for example, 308476 + ... + 308908.

Almost surely, 2^133663636 is an apocalyptic number.

It is an amenable number.

133663636 is a deficient number, since it is larger than the sum of its proper divisors (102510484).

133663636 is a wasteful number, since it uses less digits than its factorization.

133663636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003 (or 1001 counting only the distinct ones).

The product of its digits is 104976, while the sum is 37.

The square root of 133663636 is about 11561.2990619567. The cubic root of 133663636 is about 511.2944638050.

The spelling of 133663636 in words is "one hundred thirty-three million, six hundred sixty-three thousand, six hundred thirty-six".