16661657223146 has 16 divisors (see below), whose sum is σ = 28331562890400. Its totient is φ = 7285259028528.

The previous prime is 16661657223061. The next prime is 16661657223149. The reversal of 16661657223146 is 64132275616661.

It is a super-2 number, since 2×16661657223146² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16661657223091 and 16661657223100.

It is not an unprimeable number, because it can be changed into a prime (16661657223149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16864025036 + ... + 16864026023.

It is an arithmetic number, because the mean of its divisors is an integer number (1770722680650).

Almost surely, 2^{16661657223146} is an apocalyptic number.

16661657223146 is a deficient number, since it is larger than the sum of its proper divisors (11669905667254).

16661657223146 is a wasteful number, since it uses less digits than its factorization.

16661657223146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33728051093.

The product of its digits is 13063680, while the sum is 56.

The spelling of 16661657223146 in words is "sixteen trillion, six hundred sixty-one billion, six hundred fifty-seven million, two hundred twenty-three thousand, one hundred forty-six".