66623041 has 4 divisors (see below), whose sum is σ = 67715284. Its totient is φ = 65530800.

The previous prime is 66623033. The next prime is 66623047. The reversal of 66623041 is 14032666.

66623041 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14032666 = 2 ⋅7016333.

It can be written as a sum of positive squares in 2 ways, for example, as 5157441 + 61465600 = 2271^2 + 7840^2 .

It is a cyclic number.

It is not a de Polignac number, because 66623041 - 2³ = 66623033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66623047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546030 + ... + 546151.

It is an arithmetic number, because the mean of its divisors is an integer number (16928821).

Almost surely, 2^66623041 is an apocalyptic number.

66623041 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

66623041 is a deficient number, since it is larger than the sum of its proper divisors (1092243).

66623041 is a wasteful number, since it uses less digits than its factorization.

66623041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092242.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 66623041 is about 8162.2938565087. The cubic root of 66623041 is about 405.3916670329.

The spelling of 66623041 in words is "sixty-six million, six hundred twenty-three thousand, forty-one".