6642498703585 has 4 divisors (see below), whose sum is σ = 7970998444308. Its totient is φ = 5313998962864.

The previous prime is 6642498703579. The next prime is 6642498703619. The reversal of 6642498703585 is 5853078942466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1615786730496 + 5026711973089 = 1271136^2 + 2242033^2 .

It is a cyclic number.

It is not a de Polignac number, because 6642498703585 - 2⁹ = 6642498703073 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6642498703585.

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, 664249870354 + ... + 664249870363.

It is an arithmetic number, because the mean of its divisors is an integer number (1992749611077).

Almost surely, 2^{6642498703585} is an apocalyptic number.

It is an amenable number.

6642498703585 is a deficient number, since it is larger than the sum of its proper divisors (1328499740723).

6642498703585 is a wasteful number, since it uses less digits than its factorization.

6642498703585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328499740722.

The product of its (nonzero) digits is 348364800, while the sum is 67.

The spelling of 6642498703585 in words is "six trillion, six hundred forty-two billion, four hundred ninety-eight million, seven hundred three thousand, five hundred eighty-five".