6645001 has 8 divisors (see below), whose sum is σ = 7403904. Its totient is φ = 5911920.

The previous prime is 6644983. The next prime is 6645013. The reversal of 6645001 is 1005466.

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

It is a cyclic number.

It is not a de Polignac number, because 6645001 - 2⁵ = 6644969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6645071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5910 + ... + 6943.

It is an arithmetic number, because the mean of its divisors is an integer number (925488).

Almost surely, 2^6645001 is an apocalyptic number.

It is an amenable number.

6645001 is a deficient number, since it is larger than the sum of its proper divisors (758903).

6645001 is a wasteful number, since it uses less digits than its factorization.

6645001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12911.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 6645001 is about 2577.7899448947. The cubic root of 6645001 is about 188.0031027857.

It can be divided in two parts, 664 and 5001, that added together give a palindrome (5665).

The spelling of 6645001 in words is "six million, six hundred forty-five thousand, one".