66420179 has 8 divisors (see below), whose sum is σ = 78526560. Its totient is φ = 54968256.

The previous prime is 66420163. The next prime is 66420187. The reversal of 66420179 is 97102466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66420179 - 2⁴ = 66420163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66420149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163394 + ... + 163799.

It is an arithmetic number, because the mean of its divisors is an integer number (9815820).

Almost surely, 2^66420179 is an apocalyptic number.

66420179 is a deficient number, since it is larger than the sum of its proper divisors (12106381).

66420179 is a wasteful number, since it uses less digits than its factorization.

66420179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327229.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 66420179 is about 8149.8576061180. The cubic root of 66420179 is about 404.9797866252.

The spelling of 66420179 in words is "sixty-six million, four hundred twenty thousand, one hundred seventy-nine".