6642006020 has 48 divisors (see below), whose sum is σ = 15139504128. Its totient is φ = 2433110400.

The previous prime is 6642006011. The next prime is 6642006023. The reversal of 6642006020 is 206002466.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (6642006023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67556 + ... + 133595.

It is an arithmetic number, because the mean of its divisors is an integer number (315406336).

Almost surely, 2^6642006020 is an apocalyptic number.

It is an amenable number.

6642006020 is an abundant number, since it is smaller than the sum of its proper divisors (8497498108).

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

6642006020 is a wasteful number, since it uses less digits than its factorization.

6642006020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201300 (or 201298 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 6642006020 is about 81498.5031764388. The cubic root of 6642006020 is about 1879.7485347227.

Adding to 6642006020 its reverse (206002466), we get a palindrome (6848008486).

The spelling of 6642006020 in words is "six billion, six hundred forty-two million, six thousand, twenty".