16661061617344 has 28 divisors (see below), whose sum is σ = 33259768983504. Its totient is φ = 8280647385344.

The previous prime is 16661061617341. The next prime is 16661061617407. The reversal of 16661061617344 is 44371616016661.

It is a super-2 number, since 2×16661061617344² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16661061617291 and 16661061617300.

It is not an unprimeable number, because it can be changed into a prime (16661061617341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 779417719 + ... + 779439094.

It is an arithmetic number, because the mean of its divisors is an integer number (1187848892268).

Almost surely, 2^{16661061617344} is an apocalyptic number.

It is an amenable number.

16661061617344 is a deficient number, since it is larger than the sum of its proper divisors (16598707366160).

16661061617344 is a wasteful number, since it uses less digits than its factorization.

16661061617344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558856992 (or 1558856982 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 16661061617344 in words is "sixteen trillion, six hundred sixty-one billion, sixty-one million, six hundred seventeen thousand, three hundred forty-four".