11649665 has 8 divisors (see below), whose sum is σ = 14243688. Its totient is φ = 9143680.

The previous prime is 11649629. The next prime is 11649667. The reversal of 11649665 is 56694611.

It can be written as a sum of positive squares in 4 ways, for example, as 3904576 + 7745089 = 1976^2 + 2783^2 .

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

It is not a de Polignac number, because 11649665 - 2⁶ = 11649601 is a prime.

It is a super-2 number, since 2×11649665² = 271429389224450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11649667) 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, 21716 + ... + 22245.

It is an arithmetic number, because the mean of its divisors is an integer number (1780461).

Almost surely, 2^11649665 is an apocalyptic number.

It is an amenable number.

11649665 is a deficient number, since it is larger than the sum of its proper divisors (2594023).

11649665 is an equidigital number, since it uses as much as digits as its factorization.

11649665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44019.

The product of its digits is 38880, while the sum is 38.

The square root of 11649665 is about 3413.1605587783. The cubic root of 11649665 is about 226.6928446794.

The spelling of 11649665 in words is "eleven million, six hundred forty-nine thousand, six hundred sixty-five".