6649705 has 4 divisors (see below), whose sum is σ = 7979652. Its totient is φ = 5319760.

The previous prime is 6649693. The next prime is 6649723. The reversal of 6649705 is 5079466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 870489 + 5779216 = 933^2 + 2404^2 .

It is not a de Polignac number, because 6649705 - 2¹¹ = 6647657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 664966 + ... + 664975.

It is an arithmetic number, because the mean of its divisors is an integer number (1994913).

Almost surely, 2^6649705 is an apocalyptic number.

It is an amenable number.

6649705 is a deficient number, since it is larger than the sum of its proper divisors (1329947).

6649705 is a wasteful number, since it uses less digits than its factorization.

6649705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329946.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 6649705 is about 2578.7021929645. The cubic root of 6649705 is about 188.0474548230.

The spelling of 6649705 in words is "six million, six hundred forty-nine thousand, seven hundred five".