66059443 has 4 divisors (see below), whose sum is σ = 66391600. Its totient is φ = 65727288.

The previous prime is 66059429. The next prime is 66059453. The reversal of 66059443 is 34495066.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66059443 - 2²¹ = 63962291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66059453) 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, 165780 + ... + 166177.

It is an arithmetic number, because the mean of its divisors is an integer number (16597900).

Almost surely, 2^66059443 is an apocalyptic number.

66059443 is a deficient number, since it is larger than the sum of its proper divisors (332157).

66059443 is a wasteful number, since it uses less digits than its factorization.

66059443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332156.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 66059443 is about 8127.6960450056. The cubic root of 66059443 is about 404.2452906215.

The spelling of 66059443 in words is "sixty-six million, fifty-nine thousand, four hundred forty-three".