66108147 has 16 divisors (see below), whose sum is σ = 101382912. Its totient is φ = 37533600.

The previous prime is 66108137. The next prime is 66108149. The reversal of 66108147 is 74180166.

It is a happy number.

It is not a de Polignac number, because 66108147 - 2⁶ = 66108083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66108149) 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 15 ways as a sum of consecutive naturals, for example, 6729 + ... + 13322.

It is an arithmetic number, because the mean of its divisors is an integer number (6336432).

Almost surely, 2^66108147 is an apocalyptic number.

66108147 is a deficient number, since it is larger than the sum of its proper divisors (35274765).

66108147 is a wasteful number, since it uses less digits than its factorization.

66108147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20218.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 66108147 is about 8130.6916679948. The cubic root of 66108147 is about 404.3446129144.

The spelling of 66108147 in words is "sixty-six million, one hundred eight thousand, one hundred forty-seven".