666363605 has 8 divisors (see below), whose sum is σ = 801101472. Its totient is φ = 532114128.

The previous prime is 666363601. The next prime is 666363619. The reversal of 666363605 is 506363666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 666363605 - 2² = 666363601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666363601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119087 + ... + 124556.

It is an arithmetic number, because the mean of its divisors is an integer number (100137684).

Almost surely, 2^666363605 is an apocalyptic number.

It is an amenable number.

666363605 is a deficient number, since it is larger than the sum of its proper divisors (134737867).

666363605 is a wasteful number, since it uses less digits than its factorization.

666363605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244195.

The product of its (nonzero) digits is 349920, while the sum is 41.

The square root of 666363605 is about 25814.0195436511. The cubic root of 666363605 is about 873.4480702966.

The spelling of 666363605 in words is "six hundred sixty-six million, three hundred sixty-three thousand, six hundred five".