66907163 has 4 divisors (see below), whose sum is σ = 66935208. Its totient is φ = 66879120.

The previous prime is 66907153. The next prime is 66907237. The reversal of 66907163 is 36170966.

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 66907163 - 2¹⁰ = 66906139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66907103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10073 + ... + 15338.

It is an arithmetic number, because the mean of its divisors is an integer number (16733802).

Almost surely, 2^66907163 is an apocalyptic number.

66907163 is a deficient number, since it is larger than the sum of its proper divisors (28045).

66907163 is a wasteful number, since it uses less digits than its factorization.

66907163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28044.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 66907163 is about 8179.6798837118. The cubic root of 66907163 is about 405.9671303277.

The spelling of 66907163 in words is "sixty-six million, nine hundred seven thousand, one hundred sixty-three".