66710410 has 16 divisors (see below), whose sum is σ = 129315816. Its totient is φ = 24631488.

The previous prime is 66710407. The next prime is 66710447. The reversal of 66710410 is 1401766.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 31888609 + 34821801 = 5647^2 + 5901^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 256449 + ... + 256708.

Almost surely, 2^66710410 is an apocalyptic number.

66710410 is a deficient number, since it is larger than the sum of its proper divisors (62605406).

66710410 is a wasteful number, since it uses less digits than its factorization.

66710410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513177.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 66710410 is about 8167.6440911685. The cubic root of 66710410 is about 405.5687989114.

The spelling of 66710410 in words is "sixty-six million, seven hundred ten thousand, four hundred ten".