11061620661 has 16 divisors (see below), whose sum is σ = 18152403584. Its totient is φ = 5834700864.

The previous prime is 11061620653. The next prime is 11061620693. The reversal of 11061620661 is 16602616011.

It is not a de Polignac number, because 11061620661 - 2³ = 11061620653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11061620611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20259106 + ... + 20259651.

It is an arithmetic number, because the mean of its divisors is an integer number (1134525224).

Almost surely, 2^11061620661 is an apocalyptic number.

It is an amenable number.

11061620661 is a deficient number, since it is larger than the sum of its proper divisors (7090782923).

11061620661 is a wasteful number, since it uses less digits than its factorization.

11061620661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40518780.

The product of its (nonzero) digits is 2592, while the sum is 30.

The spelling of 11061620661 in words is "eleven billion, sixty-one million, six hundred twenty thousand, six hundred sixty-one".