6493440665 has 8 divisors (see below), whose sum is σ = 8202240960. Its totient is φ = 4921344432.

The previous prime is 6493440659. The next prime is 6493440713. The reversal of 6493440665 is 5660443946.

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

It is not a de Polignac number, because 6493440665 - 2⁸ = 6493440409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34175909 + ... + 34176098.

It is an arithmetic number, because the mean of its divisors is an integer number (1025280120).

Almost surely, 2^6493440665 is an apocalyptic number.

It is an amenable number.

6493440665 is a deficient number, since it is larger than the sum of its proper divisors (1708800295).

6493440665 is a wasteful number, since it uses less digits than its factorization.

6493440665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68352031.

The product of its (nonzero) digits is 1866240, while the sum is 47.

The square root of 6493440665 is about 80581.8879463617. The cubic root of 6493440665 is about 1865.6276032518.

The spelling of 6493440665 in words is "six billion, four hundred ninety-three million, four hundred forty thousand, six hundred sixty-five".