16655566642 has 16 divisors (see below), whose sum is σ = 29351068992. Its totient is φ = 6988349520.

The previous prime is 16655566639. The next prime is 16655566651. The reversal of 16655566642 is 24666555661.

It is a super-2 number, since 2×16655566642² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16655566642.

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, 29117838 + ... + 29118409.

It is an arithmetic number, because the mean of its divisors is an integer number (1834441812).

Almost surely, 2^16655566642 is an apocalyptic number.

16655566642 is a deficient number, since it is larger than the sum of its proper divisors (12695502350).

16655566642 is a wasteful number, since it uses less digits than its factorization.

16655566642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58236273.

The product of its digits is 7776000, while the sum is 52.

The spelling of 16655566642 in words is "sixteen billion, six hundred fifty-five million, five hundred sixty-six thousand, six hundred forty-two".