66609315 has 24 divisors (see below), whose sum is σ = 122249088. Its totient is φ = 33434880.

The previous prime is 66609241. The next prime is 66609337. The reversal of 66609315 is 51390666.

66609315 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66609315 - 2⁹ = 66608803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66609315.

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 23 ways as a sum of consecutive naturals, for example, 42771 + ... + 44300.

It is an arithmetic number, because the mean of its divisors is an integer number (5093712).

Almost surely, 2^66609315 is an apocalyptic number.

66609315 is a deficient number, since it is larger than the sum of its proper divisors (55639773).

66609315 is a wasteful number, since it uses less digits than its factorization.

66609315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87099 (or 87096 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 66609315 is about 8161.4529956375. The cubic root of 66609315 is about 405.3638248724.

The spelling of 66609315 in words is "sixty-six million, six hundred nine thousand, three hundred fifteen".