66943023 has 16 divisors (see below), whose sum is σ = 107377920. Its totient is φ = 36239616.

The previous prime is 66943021. The next prime is 66943033. The reversal of 66943023 is 32034966.

It is not a de Polignac number, because 66943023 - 2¹ = 66943021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66943021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83490 + ... + 84287.

It is an arithmetic number, because the mean of its divisors is an integer number (6711120).

Almost surely, 2^66943023 is an apocalyptic number.

66943023 is a deficient number, since it is larger than the sum of its proper divisors (40434897).

66943023 is a wasteful number, since it uses less digits than its factorization.

66943023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167806.

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 66943023 is about 8181.8716074013. The cubic root of 66943023 is about 406.0396456387.

Adding to 66943023 its reverse (32034966), we get a palindrome (98977989).

The spelling of 66943023 in words is "sixty-six million, nine hundred forty-three thousand, twenty-three".