16662020566522 has 4 divisors (see below), whose sum is σ = 24993030849786. Its totient is φ = 8331010283260.

The previous prime is 16662020566519. The next prime is 16662020566547. The reversal of 16662020566522 is 22566502026661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16315451699121 + 346568867401 = 4039239^2 + 588701^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4165505141629 + ... + 4165505141632.

Almost surely, 2^{16662020566522} is an apocalyptic number.

16662020566522 is a deficient number, since it is larger than the sum of its proper divisors (8331010283264).

16662020566522 is an equidigital number, since it uses as much as digits as its factorization.

16662020566522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8331010283263.

The product of its (nonzero) digits is 3110400, while the sum is 49.

The spelling of 16662020566522 in words is "sixteen trillion, six hundred sixty-two billion, twenty million, five hundred sixty-six thousand, five hundred twenty-two".