66704584 has 8 divisors (see below), whose sum is σ = 125071110. Its totient is φ = 33352288.

The previous prime is 66704579. The next prime is 66704629. The reversal of 66704584 is 48540766.

It can be written as a sum of positive squares in only one way, i.e., 48024900 + 18679684 = 6930^2 + 4322^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×66704584² = 8899003053226112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4169029 + ... + 4169044.

Almost surely, 2^66704584 is an apocalyptic number.

It is an amenable number.

66704584 is a deficient number, since it is larger than the sum of its proper divisors (58366526).

66704584 is a wasteful number, since it uses less digits than its factorization.

66704584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8338079 (or 8338075 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 66704584 is about 8167.2874321895. The cubic root of 66704584 is about 405.5569920954.

The spelling of 66704584 in words is "sixty-six million, seven hundred four thousand, five hundred eighty-four".