66564410 has 32 divisors (see below), whose sum is σ = 137592000. Its totient is φ = 22930560.

The previous prime is 66564397. The next prime is 66564427. The reversal of 66564410 is 1446566.

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 15 ways as a sum of consecutive naturals, for example, 13835 + ... + 18014.

It is an arithmetic number, because the mean of its divisors is an integer number (4299750).

Almost surely, 2^66564410 is an apocalyptic number.

66564410 is an abundant number, since it is smaller than the sum of its proper divisors (71027590).

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

66564410 is a wasteful number, since it uses less digits than its factorization.

66564410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31886.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 66564410 is about 8158.7014898205. The cubic root of 66564410 is about 405.2727117170.

The spelling of 66564410 in words is "sixty-six million, five hundred sixty-four thousand, four hundred ten".