666135361 has 16 divisors (see below), whose sum is σ = 737140608. Its totient is φ = 598752000.

The previous prime is 666135331. The next prime is 666135367. The reversal of 666135361 is 163531666.

666135361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 666135361 - 2⁵ = 666135329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666135361.

It is not an unprimeable number, because it can be changed into a prime (666135367) 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, 410131 + ... + 411751.

It is an arithmetic number, because the mean of its divisors is an integer number (46071288).

Almost surely, 2^666135361 is an apocalyptic number.

It is an amenable number.

666135361 is a deficient number, since it is larger than the sum of its proper divisors (71005247).

666135361 is a wasteful number, since it uses less digits than its factorization.

666135361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712.

The product of its digits is 58320, while the sum is 37.

The square root of 666135361 is about 25809.5982339904. The cubic root of 666135361 is about 873.3483339336.

The spelling of 666135361 in words is "six hundred sixty-six million, one hundred thirty-five thousand, three hundred sixty-one".