13066385 has 16 divisors (see below), whose sum is σ = 16405200. Its totient is φ = 9977856.

The previous prime is 13066381. The next prime is 13066399. The reversal of 13066385 is 58366031.

It can be written as a sum of positive squares in 8 ways, for example, as 2050624 + 11015761 = 1432^2 + 3319^2 .

It is not a de Polignac number, because 13066385 - 2² = 13066381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13066381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13601 + ... + 14529.

It is an arithmetic number, because the mean of its divisors is an integer number (1025325).

Almost surely, 2^13066385 is an apocalyptic number.

It is an amenable number.

13066385 is a deficient number, since it is larger than the sum of its proper divisors (3338815).

13066385 is an equidigital number, since it uses as much as digits as its factorization.

13066385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 13066385 is about 3614.7454958821. The cubic root of 13066385 is about 235.5330287863.

The spelling of 13066385 in words is "thirteen million, sixty-six thousand, three hundred eighty-five".