16666861082450 has 48 divisors (see below), whose sum is σ = 31497254002080. Its totient is φ = 6560595888000.

The previous prime is 16666861082441. The next prime is 16666861082533. The reversal of 16666861082450 is 5428016866661.

16666861082450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 16666861082450.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7936316 + ... + 9814215.

It is an arithmetic number, because the mean of its divisors is an integer number (656192791710).

Almost surely, 2^{16666861082450} is an apocalyptic number.

16666861082450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16666861082450 is a deficient number, since it is larger than the sum of its proper divisors (14830392919630).

16666861082450 is a wasteful number, since it uses less digits than its factorization.

16666861082450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17750843 (or 17750838 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 59.

The spelling of 16666861082450 in words is "sixteen trillion, six hundred sixty-six billion, eight hundred sixty-one million, eighty-two thousand, four hundred fifty".