133742661 has 8 divisors (see below), whose sum is σ = 192040800. Its totient is φ = 82303152.

The previous prime is 133742659. The next prime is 133742671. The reversal of 133742661 is 166247331.

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

It is not a de Polignac number, because 133742661 - 2¹ = 133742659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133742671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1714611 + ... + 1714688.

It is an arithmetic number, because the mean of its divisors is an integer number (24005100).

Almost surely, 2^133742661 is an apocalyptic number.

It is an amenable number.

133742661 is a deficient number, since it is larger than the sum of its proper divisors (58298139).

133742661 is a wasteful number, since it uses less digits than its factorization.

133742661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3429315.

The product of its digits is 18144, while the sum is 33.

The square root of 133742661 is about 11564.7162092288. The cubic root of 133742661 is about 511.3952069491.

Adding to 133742661 its reverse (166247331), we get a palindrome (299989992).

The spelling of 133742661 in words is "one hundred thirty-three million, seven hundred forty-two thousand, six hundred sixty-one".