133066557 has 56 divisors (see below), whose sum is σ = 226469600. Its totient is φ = 77472288.

The previous prime is 133066547. The next prime is 133066579. The reversal of 133066557 is 755660331.

It is a happy number.

133066557 is a `hidden beast` number, since 13 + 30 + 66 + 557 = 666.

It is not a de Polignac number, because 133066557 - 2⁸ = 133066301 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133066537) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 179694 + ... + 180432.

It is an arithmetic number, because the mean of its divisors is an integer number (4044100).

Almost surely, 2^133066557 is an apocalyptic number.

It is an amenable number.

133066557 is a deficient number, since it is larger than the sum of its proper divisors (93403043).

133066557 is an equidigital number, since it uses as much as digits as its factorization.

133066557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789 (or 774 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 36.

The square root of 133066557 is about 11535.4478456625. The cubic root of 133066557 is about 510.5320054004.

The spelling of 133066557 in words is "one hundred thirty-three million, sixty-six thousand, five hundred fifty-seven".