6645007 has 8 divisors (see below), whose sum is σ = 6771600. Its totient is φ = 6519744.

The previous prime is 6644983. The next prime is 6645013. The reversal of 6645007 is 7005466.

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 6645007 - 2⁷ = 6644879 is a prime.

It is a super-2 number, since 2×6645007² = 88312236060098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645047) 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, 17344 + ... + 17722.

It is an arithmetic number, because the mean of its divisors is an integer number (846450).

Almost surely, 2^6645007 is an apocalyptic number.

6645007 is a deficient number, since it is larger than the sum of its proper divisors (126593).

6645007 is a wasteful number, since it uses less digits than its factorization.

6645007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 6645007 is about 2577.7911086820. The cubic root of 6645007 is about 188.0031593705.

It can be divided in two parts, 664 and 5007, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 6645007 in words is "six million, six hundred forty-five thousand, seven".