16610655666 has 24 divisors (see below), whose sum is σ = 36515988432. Its totient is φ = 5033531800.

The previous prime is 16610655599. The next prime is 16610655667. The reversal of 16610655666 is 66655601661.

It is not an unprimeable number, because it can be changed into a prime (16610655667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11439120 + ... + 11440571.

It is an arithmetic number, because the mean of its divisors is an integer number (1521499518).

Almost surely, 2^16610655666 is an apocalyptic number.

16610655666 is an abundant number, since it is smaller than the sum of its proper divisors (19905332766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16610655666 is a wasteful number, since it uses less digits than its factorization.

16610655666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22879718 (or 22879707 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

It can be divided in two parts, 16610 and 655666, that added together give a palindrome (672276).

The spelling of 16610655666 in words is "sixteen billion, six hundred ten million, six hundred fifty-five thousand, six hundred sixty-six".