3440521665 has 24 divisors (see below), whose sum is σ = 6815510208. Its totient is φ = 1572809760.

The previous prime is 3440521649. The next prime is 3440521681. The reversal of 3440521665 is 5661250443.

3440521665 is a `hidden beast` number, since 3 + 440 + 52 + 166 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (3440521649) and next prime (3440521681).

It is not a de Polignac number, because 3440521665 - 2⁴ = 3440521649 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 5460831 + ... + 5461460.

It is an arithmetic number, because the mean of its divisors is an integer number (283979592).

Almost surely, 2^3440521665 is an apocalyptic number.

3440521665 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3440521665 is a deficient number, since it is larger than the sum of its proper divisors (3374988543).

3440521665 is a wasteful number, since it uses less digits than its factorization.

3440521665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10922309 (or 10922306 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 3440521665 is about 58655.9601830880. The cubic root of 3440521665 is about 1509.6447660774.

The spelling of 3440521665 in words is "three billion, four hundred forty million, five hundred twenty-one thousand, six hundred sixty-five".