6649965 has 64 divisors (see below), whose sum is σ = 14008320. Its totient is φ = 2928960.

The previous prime is 6649919. The next prime is 6649999. The reversal of 6649965 is 5699466.

It is not a de Polignac number, because 6649965 - 2⁶ = 6649901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6649965.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29182 + ... + 29408.

It is an arithmetic number, because the mean of its divisors is an integer number (218880).

Almost surely, 2^6649965 is an apocalyptic number.

It is an amenable number.

6649965 is an abundant number, since it is smaller than the sum of its proper divisors (7358355).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6649965 is a wasteful number, since it uses less digits than its factorization.

6649965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 273 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 6649965 is about 2578.7526054277. The cubic root of 6649965 is about 188.0499056435.

It can be divided in two parts, 66499 and 65, that added together give a square (66564 = 258²).

The spelling of 6649965 in words is "six million, six hundred forty-nine thousand, nine hundred sixty-five".