6620420016 has 120 divisors (see below), whose sum is σ = 21857997824. Its totient is φ = 1830522240.

The previous prime is 6620420011. The next prime is 6620420071. The reversal of 6620420016 is 6100240266.

It is a happy number.

6620420016 is a `hidden beast` number, since 6 + 620 + 4 + 20 + 0 + 16 = 666.

It is a super-2 number, since 2×6620420016² = 87659922376506880512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6620420011) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 74686 + ... + 137181.

Almost surely, 2^6620420016 is an apocalyptic number.

It is an amenable number.

6620420016 is an abundant number, since it is smaller than the sum of its proper divisors (15237577808).

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

6620420016 is a wasteful number, since it uses less digits than its factorization.

6620420016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211919 (or 211910 counting only the distinct ones).

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

The square root of 6620420016 is about 81365.9634982589. The cubic root of 6620420016 is about 1877.7099791333.

The spelling of 6620420016 in words is "six billion, six hundred twenty million, four hundred twenty thousand, sixteen".