66743143 has 4 divisors (see below), whose sum is σ = 70255960. Its totient is φ = 63230328.

The previous prime is 66743141. The next prime is 66743167. The reversal of 66743143 is 34134766.

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

It is not a de Polignac number, because 66743143 - 2¹ = 66743141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66743099 and 66743108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66743141) 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, 1756380 + ... + 1756417.

It is an arithmetic number, because the mean of its divisors is an integer number (17563990).

Almost surely, 2^66743143 is an apocalyptic number.

66743143 is a deficient number, since it is larger than the sum of its proper divisors (3512817).

66743143 is a wasteful number, since it uses less digits than its factorization.

66743143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512816.

The product of its digits is 36288, while the sum is 34.

The square root of 66743143 is about 8169.6476668214. The cubic root of 66743143 is about 405.6351219575.

The spelling of 66743143 in words is "sixty-six million, seven hundred forty-three thousand, one hundred forty-three".