66559073 has 8 divisors (see below), whose sum is σ = 77203392. Its totient is φ = 56198736.

The previous prime is 66559069. The next prime is 66559081. The reversal of 66559073 is 37095566.

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 66559073 - 2² = 66559069 is a prime.

It is a super-2 number, since 2×66559073² = 8860220397238658, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66559073.

It is not an unprimeable number, because it can be changed into a prime (66559093) 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, 70490 + ... + 71427.

It is an arithmetic number, because the mean of its divisors is an integer number (9650424).

Almost surely, 2^66559073 is an apocalyptic number.

It is an amenable number.

66559073 is a deficient number, since it is larger than the sum of its proper divisors (10644319).

66559073 is a wasteful number, since it uses less digits than its factorization.

66559073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141991.

The product of its (nonzero) digits is 170100, while the sum is 41.

The square root of 66559073 is about 8158.3744091577. The cubic root of 66559073 is about 405.2618801115.

The spelling of 66559073 in words is "sixty-six million, five hundred fifty-nine thousand, seventy-three".