66043123 has 4 divisors (see below), whose sum is σ = 66230568. Its totient is φ = 65855680.

The previous prime is 66043111. The next prime is 66043157. The reversal of 66043123 is 32134066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32134066 = 2 ⋅16067033.

It is not a de Polignac number, because 66043123 - 2⁵ = 66043091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66044123) 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, 93193 + ... + 93898.

It is an arithmetic number, because the mean of its divisors is an integer number (16557642).

Almost surely, 2^66043123 is an apocalyptic number.

66043123 is a deficient number, since it is larger than the sum of its proper divisors (187445).

66043123 is a wasteful number, since it uses less digits than its factorization.

66043123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187444.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 66043123 is about 8126.6920084374. The cubic root of 66043123 is about 404.2119982503.

Adding to 66043123 its reverse (32134066), we get a palindrome (98177189).

It can be divided in two parts, 66043 and 123, that added together give a palindrome (66166).

The spelling of 66043123 in words is "sixty-six million, forty-three thousand, one hundred twenty-three".