66171137 has 8 divisors (see below), whose sum is σ = 66851616. Its totient is φ = 65493792.

The previous prime is 66171107. The next prime is 66171151. The reversal of 66171137 is 73117166.

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 66171137 - 2¹⁰ = 66170113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66171107) 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, 74498 + ... + 75380.

It is an arithmetic number, because the mean of its divisors is an integer number (8356452).

Almost surely, 2^66171137 is an apocalyptic number.

It is an amenable number.

66171137 is a deficient number, since it is larger than the sum of its proper divisors (680479).

66171137 is a wasteful number, since it uses less digits than its factorization.

66171137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567.

The product of its digits is 5292, while the sum is 32.

The square root of 66171137 is about 8134.5643399017. The cubic root of 66171137 is about 404.4729963949.

The spelling of 66171137 in words is "sixty-six million, one hundred seventy-one thousand, one hundred thirty-seven".