66065143 has 4 divisors (see below), whose sum is σ = 66261520. Its totient is φ = 65868768.

The previous prime is 66065107. The next prime is 66065173. The reversal of 66065143 is 34156066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66065143 is a prime.

It is a super-2 number, since 2×66065143² = 8729206239220898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66065173) 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, 97683 + ... + 98356.

It is an arithmetic number, because the mean of its divisors is an integer number (16565380).

Almost surely, 2^66065143 is an apocalyptic number.

66065143 is a deficient number, since it is larger than the sum of its proper divisors (196377).

66065143 is a wasteful number, since it uses less digits than its factorization.

66065143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196376.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 66065143 is about 8128.0466903187. The cubic root of 66065143 is about 404.2569171798.

The spelling of 66065143 in words is "sixty-six million, sixty-five thousand, one hundred forty-three".