133020656 has 10 divisors (see below), whose sum is σ = 257727552. Its totient is φ = 66510320.

The previous prime is 133020649. The next prime is 133020683. The reversal of 133020656 is 656020331.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4156880 + ... + 4156911.

Almost surely, 2^133020656 is an apocalyptic number.

133020656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

133020656 is a deficient number, since it is larger than the sum of its proper divisors (124706896).

133020656 is an equidigital number, since it uses as much as digits as its factorization.

133020656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8313799 (or 8313793 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 133020656 is about 11533.4581110784. The cubic root of 133020656 is about 510.4732963726.

Adding to 133020656 its reverse (656020331), we get a palindrome (789040987).

The spelling of 133020656 in words is "one hundred thirty-three million, twenty thousand, six hundred fifty-six".