16663409783056 has 45 divisors (see below), whose sum is σ = 32349419921559. Its totient is φ = 8315205108000.

The previous prime is 16663409783023. The next prime is 16663409783057. The reversal of 16663409783056 is 65038790436661.

The square root of 16663409783056 is 4082084.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16663409783057) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15854813731 + ... + 15854814781.

Almost surely, 2^{16663409783056} is an apocalyptic number.

16663409783056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

16663409783056 is the 4082084-th square number.

It is an amenable number.

16663409783056 is a deficient number, since it is larger than the sum of its proper divisors (15686010138503).

16663409783056 is an frugal number, since it uses more digits than its factorization.

16663409783056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4052 (or 2024 counting only the distinct ones).

The product of its (nonzero) digits is 117573120, while the sum is 64.

The spelling of 16663409783056 in words is "sixteen trillion, six hundred sixty-three billion, four hundred nine million, seven hundred eighty-three thousand, fifty-six".