6642514642 has 8 divisors (see below), whose sum is σ = 9979922556. Its totient is φ = 3315873792.

The previous prime is 6642514639. The next prime is 6642514649. The reversal of 6642514642 is 2464152466.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5529558321 + 1112956321 = 74361^2 + 33361^2 .

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 = 6642514595 and 6642514604.

It is not an unprimeable number, because it can be changed into a prime (6642514649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2690223 + ... + 2692690.

Almost surely, 2^6642514642 is an apocalyptic number.

6642514642 is a deficient number, since it is larger than the sum of its proper divisors (3337407914).

6642514642 is a wasteful number, since it uses less digits than its factorization.

6642514642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5383532.

The product of its digits is 276480, while the sum is 40.

The square root of 6642514642 is about 81501.6235543808. The cubic root of 6642514642 is about 1879.7965150594.

It can be divided in two parts, 6642 and 514642, that added together give a square (521284 = 722²).

The spelling of 6642514642 in words is "six billion, six hundred forty-two million, five hundred fourteen thousand, six hundred forty-two".