16611560066 has 16 divisors (see below), whose sum is σ = 26004240000. Its totient is φ = 7943578368.

The previous prime is 16611560059. The next prime is 16611560083. The reversal of 16611560066 is 66006511661.

It is a happy 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, 393890 + ... + 434018.

It is an arithmetic number, because the mean of its divisors is an integer number (1625265000).

Almost surely, 2^16611560066 is an apocalyptic number.

16611560066 is a deficient number, since it is larger than the sum of its proper divisors (9392679934).

16611560066 is a wasteful number, since it uses less digits than its factorization.

16611560066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49153.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 16611560066 in words is "sixteen billion, six hundred eleven million, five hundred sixty thousand, sixty-six".