16661657223148 has 24 divisors (see below), whose sum is σ = 33323401748000. Its totient is φ = 7140691531008.

The previous prime is 16661657223061. The next prime is 16661657223149. The reversal of 16661657223148 is 84132275616661.

It is a super-2 number, since 2×16661657223148² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16661657223092 and 16661657223101.

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, 18245668 + ... + 19137076.

Almost surely, 2^{16661657223148} is an apocalyptic number.

It is an amenable number.

16661657223148 is an abundant number, since it is smaller than the sum of its proper divisors (16661744524852).

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

16661657223148 is a wasteful number, since it uses less digits than its factorization.

16661657223148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558969 (or 1558967 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 58.

The spelling of 16661657223148 in words is "sixteen trillion, six hundred sixty-one billion, six hundred fifty-seven million, two hundred twenty-three thousand, one hundred forty-eight".