66185133 has 12 divisors (see below), whose sum is σ = 102654720. Its totient is φ = 37819992.

The previous prime is 66185101. The next prime is 66185143. The reversal of 66185133 is 33158166.

It is not a de Polignac number, because 66185133 - 2⁵ = 66185101 is a prime.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66185094 and 66185103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66185143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224973 + ... + 225266.

It is an arithmetic number, because the mean of its divisors is an integer number (8554560).

Almost surely, 2^66185133 is an apocalyptic number.

It is an amenable number.

66185133 is a deficient number, since it is larger than the sum of its proper divisors (36469587).

66185133 is a wasteful number, since it uses less digits than its factorization.

66185133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450256 (or 450249 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 66185133 is about 8135.4245740465. The cubic root of 66185133 is about 404.5015113700.

The spelling of 66185133 in words is "sixty-six million, one hundred eighty-five thousand, one hundred thirty-three".