66145163 has 4 divisors (see below), whose sum is σ = 75594480. Its totient is φ = 56695848.

The previous prime is 66145141. The next prime is 66145169. The reversal of 66145163 is 36154166.

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 66145163 - 2⁸ = 66144907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66145169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4724648 + ... + 4724661.

It is an arithmetic number, because the mean of its divisors is an integer number (18898620).

Almost surely, 2^66145163 is an apocalyptic number.

66145163 is a deficient number, since it is larger than the sum of its proper divisors (9449317).

66145163 is an equidigital number, since it uses as much as digits as its factorization.

66145163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9449316.

The product of its digits is 12960, while the sum is 32.

The square root of 66145163 is about 8132.9676625448. The cubic root of 66145163 is about 404.4200671925.

The spelling of 66145163 in words is "sixty-six million, one hundred forty-five thousand, one hundred sixty-three".