344966665 has 8 divisors (see below), whose sum is σ = 421770888. Its totient is φ = 270766080.

The previous prime is 344966663. The next prime is 344966681. The reversal of 344966665 is 566669443.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4822416 + 340144249 = 2196^2 + 18443^2 .

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

It is not a de Polignac number, because 344966665 - 2¹ = 344966663 is a prime.

It is a super-2 number, since 2×344966665² = 238003999922444450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (344966663) 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, 650616 + ... + 651145.

It is an arithmetic number, because the mean of its divisors is an integer number (52721361).

Almost surely, 2^344966665 is an apocalyptic number.

It is an amenable number.

344966665 is a deficient number, since it is larger than the sum of its proper divisors (76804223).

344966665 is a wasteful number, since it uses less digits than its factorization.

344966665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301819.

The product of its digits is 2799360, while the sum is 49.

The square root of 344966665 is about 18573.2782512943. The cubic root of 344966665 is about 701.3353184766.

The spelling of 344966665 in words is "three hundred forty-four million, nine hundred sixty-six thousand, six hundred sixty-five".