11666779 has 4 divisors (see below), whose sum is σ = 12280840. Its totient is φ = 11052720.

The previous prime is 11666749. The next prime is 11666797. The reversal of 11666779 is 97766611.

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

It is a cyclic number.

It is not a de Polignac number, because 11666779 - 2⁵ = 11666747 is a prime.

It is a super-2 number, since 2×11666779² = 272227464469682, which contains 22 as substring.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11666749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307002 + ... + 307039.

It is an arithmetic number, because the mean of its divisors is an integer number (3070210).

Almost surely, 2^11666779 is an apocalyptic number.

11666779 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

11666779 is a deficient number, since it is larger than the sum of its proper divisors (614061).

11666779 is an equidigital number, since it uses as much as digits as its factorization.

11666779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614060.

The product of its digits is 95256, while the sum is 43.

The square root of 11666779 is about 3415.6666991965. Note that the first 4 decimals coincide. The cubic root of 11666779 is about 226.8037984593.

The spelling of 11666779 in words is "eleven million, six hundred sixty-six thousand, seven hundred seventy-nine".