16668542454 has 32 divisors (see below), whose sum is σ = 34959085920. Its totient is φ = 5291096832.

The previous prime is 16668542447. The next prime is 16668542467. The reversal of 16668542454 is 45424586661.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16668542397 and 16668542406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 643437 + ... + 668840.

It is an arithmetic number, because the mean of its divisors is an integer number (1092471435).

Almost surely, 2^16668542454 is an apocalyptic number.

16668542454 is an abundant number, since it is smaller than the sum of its proper divisors (18290543466).

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

16668542454 is a wasteful number, since it uses less digits than its factorization.

16668542454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312384.

The product of its digits is 5529600, while the sum is 51.

The spelling of 16668542454 in words is "sixteen billion, six hundred sixty-eight million, five hundred forty-two thousand, four hundred fifty-four".