16620221570 has 16 divisors (see below), whose sum is σ = 29975883840. Its totient is φ = 6634869744.

The previous prime is 16620221561. The next prime is 16620221587. The reversal of 16620221570 is 7512202661.

16620221570 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1647080 + ... + 1657139.

It is an arithmetic number, because the mean of its divisors is an integer number (1873492740).

Almost surely, 2^16620221570 is an apocalyptic number.

16620221570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16620221570 is a deficient number, since it is larger than the sum of its proper divisors (13355662270).

16620221570 is a wasteful number, since it uses less digits than its factorization.

16620221570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3304729.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 16620221570 in words is "sixteen billion, six hundred twenty million, two hundred twenty-one thousand, five hundred seventy".