66164673 has 8 divisors (see below), whose sum is σ = 90096768. Its totient is φ = 43171184.

The previous prime is 66164671. The next prime is 66164677. The reversal of 66164673 is 37646166.

It is a happy number.

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 66164673 - 2¹ = 66164671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66164671) 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, 234486 + ... + 234767.

It is an arithmetic number, because the mean of its divisors is an integer number (11262096).

Almost surely, 2^66164673 is an apocalyptic number.

It is an amenable number.

66164673 is a deficient number, since it is larger than the sum of its proper divisors (23932095).

66164673 is a wasteful number, since it uses less digits than its factorization.

66164673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469303.

The product of its digits is 108864, while the sum is 39.

The square root of 66164673 is about 8134.1670132842. The cubic root of 66164673 is about 404.4598255034.

The spelling of 66164673 in words is "sixty-six million, one hundred sixty-four thousand, six hundred seventy-three".