11670021779 has 4 divisors (see below), whose sum is σ = 12567715776. Its totient is φ = 10772327784.

The previous prime is 11670021767. The next prime is 11670021799. The reversal of 11670021779 is 97712007611.

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 11670021779 - 2²⁴ = 11653244563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11670021799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448846979 + ... + 448847004.

It is an arithmetic number, because the mean of its divisors is an integer number (3141928944).

Almost surely, 2^11670021779 is an apocalyptic number.

11670021779 is a deficient number, since it is larger than the sum of its proper divisors (897693997).

11670021779 is an equidigital number, since it uses as much as digits as its factorization.

11670021779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897693996.

The product of its (nonzero) digits is 37044, while the sum is 41.

The spelling of 11670021779 in words is "eleven billion, six hundred seventy million, twenty-one thousand, seven hundred seventy-nine".