66605318 has 8 divisors (see below), whose sum is σ = 107593248. Its totient is φ = 30740904.

The previous prime is 66605311. The next prime is 66605327. The reversal of 66605318 is 81350666.

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

It is a super-2 number, since 2×66605318² = 8872536771762248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66605311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1280846 + ... + 1280897.

It is an arithmetic number, because the mean of its divisors is an integer number (13449156).

Almost surely, 2^66605318 is an apocalyptic number.

66605318 is a deficient number, since it is larger than the sum of its proper divisors (40987930).

66605318 is a wasteful number, since it uses less digits than its factorization.

66605318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561758.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 66605318 is about 8161.2081213507. The cubic root of 66605318 is about 405.3557165389.

The spelling of 66605318 in words is "sixty-six million, six hundred five thousand, three hundred eighteen".