66575543 has 8 divisors (see below), whose sum is σ = 68736528. Its totient is φ = 64433664.

The previous prime is 66575521. The next prime is 66575549. The reversal of 66575543 is 34557566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66575543 - 2⁶ = 66575479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66575543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66575549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2480 + ... + 11802.

It is an arithmetic number, because the mean of its divisors is an integer number (8592066).

Almost surely, 2^66575543 is an apocalyptic number.

66575543 is a deficient number, since it is larger than the sum of its proper divisors (2160985).

66575543 is a wasteful number, since it uses less digits than its factorization.

66575543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9553.

The product of its digits is 378000, while the sum is 41.

The square root of 66575543 is about 8159.3837389842. The cubic root of 66575543 is about 405.2953046190.

The spelling of 66575543 in words is "sixty-six million, five hundred seventy-five thousand, five hundred forty-three".