6466665 has 16 divisors (see below), whose sum is σ = 10378368. Its totient is φ = 3438336.

The previous prime is 6466661. The next prime is 6466679. The reversal of 6466665 is 5666646.

It is not a de Polignac number, because 6466665 - 2² = 6466661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6466661) by changing a digit.

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, 8532 + ... + 9258.

It is an arithmetic number, because the mean of its divisors is an integer number (648648).

Almost surely, 2^6466665 is an apocalyptic number.

It is an amenable number.

6466665 is a deficient number, since it is larger than the sum of its proper divisors (3911703).

6466665 is a wasteful number, since it uses less digits than its factorization.

6466665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328.

The product of its digits is 155520, while the sum is 39.

The square root of 6466665 is about 2542.9638219998. The cubic root of 6466665 is about 186.3059768986.

The spelling of 6466665 in words is "six million, four hundred sixty-six thousand, six hundred sixty-five".