6420420066026 has 8 divisors (see below), whose sum is σ = 9648431635044. Its totient is φ = 3204276187680.

The previous prime is 6420420066019. The next prime is 6420420066101. The reversal of 6420420066026 is 6206600240246.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5991964726801 + 428455339225 = 2447849^2 + 654565^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2966921315 + ... + 2966923478.

Almost surely, 2^{6420420066026} is an apocalyptic number.

6420420066026 is a deficient number, since it is larger than the sum of its proper divisors (3228011569018).

6420420066026 is a wasteful number, since it uses less digits than its factorization.

6420420066026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5933845336.

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 6420420066026 in words is "six trillion, four hundred twenty billion, four hundred twenty million, sixty-six thousand, twenty-six".