665354361 has 8 divisors (see below), whose sum is σ = 1013873344. Its totient is φ = 380202480.

The previous prime is 665354359. The next prime is 665354377. The reversal of 665354361 is 163453566.

It is a happy number.

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

It is not a de Polignac number, because 665354361 - 2¹ = 665354359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665354341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15841750 + ... + 15841791.

It is an arithmetic number, because the mean of its divisors is an integer number (126734168).

Almost surely, 2^665354361 is an apocalyptic number.

It is an amenable number.

665354361 is a deficient number, since it is larger than the sum of its proper divisors (348518983).

665354361 is a wasteful number, since it uses less digits than its factorization.

665354361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31683551.

The product of its digits is 194400, while the sum is 39.

The square root of 665354361 is about 25794.4637664752. The cubic root of 665354361 is about 873.0068859191.

The spelling of 665354361 in words is "six hundred sixty-five million, three hundred fifty-four thousand, three hundred sixty-one".