66559434 has 16 divisors (see below), whose sum is σ = 135375840. Its totient is φ = 21810320.

The previous prime is 66559417. The next prime is 66559453. The reversal of 66559434 is 43495566.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93657 + ... + 94364.

It is an arithmetic number, because the mean of its divisors is an integer number (8460990).

Almost surely, 2^66559434 is an apocalyptic number.

66559434 is an abundant number, since it is smaller than the sum of its proper divisors (68816406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66559434 is a wasteful number, since it uses less digits than its factorization.

66559434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188085.

The product of its digits is 388800, while the sum is 42.

The square root of 66559434 is about 8158.3965336333. The cubic root of 66559434 is about 405.2626127904.

The spelling of 66559434 in words is "sixty-six million, five hundred fifty-nine thousand, four hundred thirty-four".