11661106655 has 16 divisors (see below), whose sum is σ = 15458688000. Its totient is φ = 8373449760.

The previous prime is 11661106619. The next prime is 11661106703. The reversal of 11661106655 is 55660116611.

It is not a de Polignac number, because 11661106655 - 2³² = 7366139359 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1337555 + ... + 1346244.

It is an arithmetic number, because the mean of its divisors is an integer number (966168000).

Almost surely, 2^11661106655 is an apocalyptic number.

11661106655 is a deficient number, since it is larger than the sum of its proper divisors (3797581345).

11661106655 is a wasteful number, since it uses less digits than its factorization.

11661106655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683894.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 11661106655 in words is "eleven billion, six hundred sixty-one million, one hundred six thousand, six hundred fifty-five".