66704570 has 8 divisors (see below), whose sum is σ = 120068244. Its totient is φ = 26681824.

The previous prime is 66704557. The next prime is 66704579. The reversal of 66704570 is 7540766.

It can be written as a sum of positive squares in 2 ways, for example, as 65011969 + 1692601 = 8063^2 + 1301^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66704570.

It is not an unprimeable number, because it can be changed into a prime (66704579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3335219 + ... + 3335238.

Almost surely, 2^66704570 is an apocalyptic number.

66704570 is a deficient number, since it is larger than the sum of its proper divisors (53363674).

66704570 is a wasteful number, since it uses less digits than its factorization.

66704570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6670464.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 66704570 is about 8167.2865751117. The cubic root of 66704570 is about 405.5569637226.

The spelling of 66704570 in words is "sixty-six million, seven hundred four thousand, five hundred seventy".