6642020426 has 8 divisors (see below), whose sum is σ = 10039084704. Its totient is φ = 3295658860.

The previous prime is 6642020383. The next prime is 6642020443. The reversal of 6642020426 is 6240202466.

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

It is a junction number, because it is equal to n+sod(n) for n = 6642020392 and 6642020401.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12675350 + ... + 12675873.

It is an arithmetic number, because the mean of its divisors is an integer number (1254885588).

Almost surely, 2^6642020426 is an apocalyptic number.

6642020426 is a deficient number, since it is larger than the sum of its proper divisors (3397064278).

6642020426 is a wasteful number, since it uses less digits than its factorization.

6642020426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25351356.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 6642020426 is about 81498.5915583822. The cubic root of 6642020426 is about 1879.7498937317.

The spelling of 6642020426 in words is "six billion, six hundred forty-two million, twenty thousand, four hundred twenty-six".