66133427 has 4 divisors (see below), whose sum is σ = 68413920. Its totient is φ = 63852936.

The previous prime is 66133411. The next prime is 66133429. The reversal of 66133427 is 72433166.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66133427 - 2⁴ = 66133411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66133393 and 66133402.

It is not an unprimeable number, because it can be changed into a prime (66133429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1140203 + ... + 1140260.

It is an arithmetic number, because the mean of its divisors is an integer number (17103480).

Almost surely, 2^66133427 is an apocalyptic number.

66133427 is a deficient number, since it is larger than the sum of its proper divisors (2280493).

66133427 is a wasteful number, since it uses less digits than its factorization.

66133427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2280492.

The product of its digits is 18144, while the sum is 32.

The square root of 66133427 is about 8132.2461226896. The cubic root of 66133427 is about 404.3961473046.

The spelling of 66133427 in words is "sixty-six million, one hundred thirty-three thousand, four hundred twenty-seven".