11666709 has 12 divisors (see below), whose sum is σ = 17843436. Its totient is φ = 7320192.

The previous prime is 11666701. The next prime is 11666737. The reversal of 11666709 is 90766611.

11666709 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6275025 + 5391684 = 2505^2 + 2322^2 .

It is not a de Polignac number, because 11666709 - 2³ = 11666701 is a prime.

It is a super-2 number, since 2×11666709² = 272224197781362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11666701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37974 + ... + 38279.

It is an arithmetic number, because the mean of its divisors is an integer number (1486953).

Almost surely, 2^11666709 is an apocalyptic number.

It is an amenable number.

11666709 is a deficient number, since it is larger than the sum of its proper divisors (6176727).

11666709 is a wasteful number, since it uses less digits than its factorization.

11666709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76276 (or 76273 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 11666709 is about 3415.6564522797. The cubic root of 11666709 is about 226.8033448552.

It can be divided in two parts, 1166 and 6709, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 11666709 in words is "eleven million, six hundred sixty-six thousand, seven hundred nine".