133527661 has 8 divisors (see below), whose sum is σ = 135475200. Its totient is φ = 131588352.

The previous prime is 133527643. The next prime is 133527671. The reversal of 133527661 is 166725331.

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

It is a cyclic number.

It is not a de Polignac number, because 133527661 - 2¹³ = 133519469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133527601) 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, 35476 + ... + 39058.

It is an arithmetic number, because the mean of its divisors is an integer number (16934400).

Almost surely, 2^133527661 is an apocalyptic number.

It is an amenable number.

133527661 is a deficient number, since it is larger than the sum of its proper divisors (1947539).

133527661 is an equidigital number, since it uses as much as digits as its factorization.

133527661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4115.

The product of its digits is 22680, while the sum is 34.

The square root of 133527661 is about 11555.4169548312. The cubic root of 133527661 is about 511.1210263234.

The spelling of 133527661 in words is "one hundred thirty-three million, five hundred twenty-seven thousand, six hundred sixty-one".