66334161 has 4 divisors (see below), whose sum is σ = 88445552. Its totient is φ = 44222772.

The previous prime is 66334159. The next prime is 66334207. The reversal of 66334161 is 16143366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66334161 - 2¹ = 66334159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66334361) 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, 11055691 + ... + 11055696.

It is an arithmetic number, because the mean of its divisors is an integer number (22111388).

Almost surely, 2^66334161 is an apocalyptic number.

It is an amenable number.

66334161 is a deficient number, since it is larger than the sum of its proper divisors (22111391).

66334161 is a wasteful number, since it uses less digits than its factorization.

66334161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22111390.

The product of its digits is 7776, while the sum is 30.

The square root of 66334161 is about 8144.5786263011. The cubic root of 66334161 is about 404.8048869654.

The spelling of 66334161 in words is "sixty-six million, three hundred thirty-four thousand, one hundred sixty-one".