665218342 has 8 divisors (see below), whose sum is σ = 1021032936. Its totient is φ = 324874032.

The previous prime is 665218339. The next prime is 665218349. The reversal of 665218342 is 243812566.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665218349) 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, 3867463 + ... + 3867634.

It is an arithmetic number, because the mean of its divisors is an integer number (127629117).

Almost surely, 2^665218342 is an apocalyptic number.

665218342 is a deficient number, since it is larger than the sum of its proper divisors (355814594).

665218342 is a wasteful number, since it uses less digits than its factorization.

665218342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7735142.

The product of its digits is 69120, while the sum is 37.

The square root of 665218342 is about 25791.8270388121. The cubic root of 665218342 is about 872.9473919996.

The spelling of 665218342 in words is "six hundred sixty-five million, two hundred eighteen thousand, three hundred forty-two".