6649001 has 6 divisors (see below), whose sum is σ = 6951210. Its totient is φ = 6359408.

The previous prime is 6648997. The next prime is 6649007. The reversal of 6649001 is 1009466.

It can be written as a sum of positive squares in only one way, i.e., 6635776 + 13225 = 2576^2 + 115^2 .

It is not a de Polignac number, because 6649001 - 2² = 6648997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6649007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5756 + ... + 6813.

It is an arithmetic number, because the mean of its divisors is an integer number (1158535).

Almost surely, 2^6649001 is an apocalyptic number.

It is an amenable number.

6649001 is a deficient number, since it is larger than the sum of its proper divisors (302209).

6649001 is a wasteful number, since it uses less digits than its factorization.

6649001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12615 (or 12592 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 6649001 is about 2578.5656865785. The cubic root of 6649001 is about 188.0408184343.

The spelling of 6649001 in words is "six million, six hundred forty-nine thousand, one".