133103661 has 8 divisors (see below), whose sum is σ = 177664704. Its totient is φ = 88639200.

The previous prime is 133103657. The next prime is 133103669. The reversal of 133103661 is 166301331.

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

It is not a de Polignac number, because 133103661 - 2² = 133103657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133103669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20865 + ... + 26486.

It is an arithmetic number, because the mean of its divisors is an integer number (22208088).

Almost surely, 2^133103661 is an apocalyptic number.

It is an amenable number.

133103661 is a deficient number, since it is larger than the sum of its proper divisors (44561043).

133103661 is an equidigital number, since it uses as much as digits as its factorization.

133103661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48291.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 133103661 is about 11537.0559936233. The cubic root of 133103661 is about 510.5794528822.

Adding to 133103661 its reverse (166301331), we get a palindrome (299404992).

The spelling of 133103661 in words is "one hundred thirty-three million, one hundred three thousand, six hundred sixty-one".