11111660405 has 8 divisors (see below), whose sum is σ = 13422297984. Its totient is φ = 8830458000.

The previous prime is 11111660383. The next prime is 11111660419. The reversal of 11111660405 is 50406611111.

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

It is not a de Polignac number, because 11111660405 - 2¹⁰ = 11111659381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7357961 + ... + 7359470.

It is an arithmetic number, because the mean of its divisors is an integer number (1677787248).

Almost surely, 2^11111660405 is an apocalyptic number.

It is an amenable number.

11111660405 is a deficient number, since it is larger than the sum of its proper divisors (2310637579).

11111660405 is a wasteful number, since it uses less digits than its factorization.

11111660405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14717587.

The product of its (nonzero) digits is 720, while the sum is 26.

The spelling of 11111660405 in words is "eleven billion, one hundred eleven million, six hundred sixty thousand, four hundred five".