1344867665 has 16 divisors (see below), whose sum is σ = 1621976400. Its totient is φ = 1070487552.

The previous prime is 1344867659. The next prime is 1344867677. The reversal of 1344867665 is 5667684431.

It can be written as a sum of positive squares in 8 ways, for example, as 12909649 + 1331958016 = 3593^2 + 36496^2 .

It is a cyclic number.

It is not a de Polignac number, because 1344867665 - 2⁴ = 1344867649 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1212131 + ... + 1213239.

It is an arithmetic number, because the mean of its divisors is an integer number (101373525).

Almost surely, 2^1344867665 is an apocalyptic number.

It is an amenable number.

1344867665 is a deficient number, since it is larger than the sum of its proper divisors (277108735).

1344867665 is a wasteful number, since it uses less digits than its factorization.

1344867665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116.

The product of its digits is 2903040, while the sum is 50.

The square root of 1344867665 is about 36672.4374019508. The cubic root of 1344867665 is about 1103.8071018017.

The spelling of 1344867665 in words is "one billion, three hundred forty-four million, eight hundred sixty-seven thousand, six hundred sixty-five".