16661534224420 has 48 divisors (see below), whose sum is σ = 35170405079040. Its totient is φ = 6630109480064.

The previous prime is 16661534224411. The next prime is 16661534224453. The reversal of 16661534224420 is 2442243516661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39501477 + ... + 39921043.

It is an arithmetic number, because the mean of its divisors is an integer number (732716772480).

Almost surely, 2^{16661534224420} is an apocalyptic number.

16661534224420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16661534224420 is an abundant number, since it is smaller than the sum of its proper divisors (18508870854620).

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

16661534224420 is a wasteful number, since it uses less digits than its factorization.

16661534224420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429852 (or 429850 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 46.

The spelling of 16661534224420 in words is "sixteen trillion, six hundred sixty-one billion, five hundred thirty-four million, two hundred twenty-four thousand, four hundred twenty".