66608704 has 56 divisors (see below), whose sum is σ = 137022840. Its totient is φ = 32108544.

The previous prime is 66608681. The next prime is 66608749. The reversal of 66608704 is 40780666.

66608704 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5017600 + 61591104 = 2240^2 + 7848^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247482 + ... + 247750.

Almost surely, 2^66608704 is an apocalyptic number.

66608704 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66608704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68511420).

66608704 is an abundant number, since it is smaller than the sum of its proper divisors (70414136).

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

66608704 is a wasteful number, since it uses less digits than its factorization.

66608704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 66608704 is about 8161.4155634914. The cubic root of 66608704 is about 405.3625854158.

The spelling of 66608704 in words is "sixty-six million, six hundred eight thousand, seven hundred four".