66478163 has 8 divisors (see below), whose sum is σ = 68185920. Its totient is φ = 64782720.

The previous prime is 66478151. The next prime is 66478183. The reversal of 66478163 is 36187466.

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 66478163 - 2⁸ = 66477907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66478163.

It is not an unprimeable number, because it can be changed into a prime (66478183) 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, 8393 + ... + 14261.

It is an arithmetic number, because the mean of its divisors is an integer number (8523240).

Almost surely, 2^66478163 is an apocalyptic number.

66478163 is a deficient number, since it is larger than the sum of its proper divisors (1707757).

66478163 is a wasteful number, since it uses less digits than its factorization.

66478163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6157.

The product of its digits is 145152, while the sum is 41.

The square root of 66478163 is about 8153.4141928397. The cubic root of 66478163 is about 405.0975998076.

The spelling of 66478163 in words is "sixty-six million, four hundred seventy-eight thousand, one hundred sixty-three".