66213163 has 8 divisors (see below), whose sum is σ = 68904000. Its totient is φ = 63574728.

The previous prime is 66213131. The next prime is 66213187. The reversal of 66213163 is 36131266.

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 66213163 - 2⁵ = 66213131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66213193) 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, 10513 + ... + 15586.

It is an arithmetic number, because the mean of its divisors is an integer number (8613000).

Almost surely, 2^66213163 is an apocalyptic number.

66213163 is a deficient number, since it is larger than the sum of its proper divisors (2690837).

66213163 is a wasteful number, since it uses less digits than its factorization.

66213163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26201.

The product of its digits is 3888, while the sum is 28.

The square root of 66213163 is about 8137.1471044832. The cubic root of 66213163 is about 404.5586066552.

The spelling of 66213163 in words is "sixty-six million, two hundred thirteen thousand, one hundred sixty-three".