6642020016 has 30 divisors (see below), whose sum is σ = 18588431420. Its totient is φ = 2214006624.

The previous prime is 6642019999. The next prime is 6642020023. The reversal of 6642020016 is 6100202466.

It is a happy number.

6642020016 is a `hidden beast` number, since 6 + 642 + 0 + 2 + 0 + 0 + 16 = 666.

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 5 ways as a sum of consecutive naturals, for example, 23062426 + ... + 23062713.

Almost surely, 2^6642020016 is an apocalyptic number.

It is an amenable number.

6642020016 is an abundant number, since it is smaller than the sum of its proper divisors (11946411404).

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

6642020016 is a wasteful number, since it uses less digits than its factorization.

6642020016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46125153 (or 46125144 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 6642020016 is about 81498.5890430012. The cubic root of 6642020016 is about 1879.7498550538.

It can be divided in two parts, 66420 and 20016, that added together give a square (86436 = 294²).

The spelling of 6642020016 in words is "six billion, six hundred forty-two million, twenty thousand, sixteen".