6642406718410 has 8 divisors (see below), whose sum is σ = 11956332093156. Its totient is φ = 2656962687360.

The previous prime is 6642406718383. The next prime is 6642406718447. The reversal of 6642406718410 is 148176042466.

It can be written as a sum of positive squares in 2 ways, for example, as 6408558069169 + 233848649241 = 2531513^2 + 483579^2 .

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

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, 332120335911 + ... + 332120335930.

Almost surely, 2^{6642406718410} is an apocalyptic number.

6642406718410 is a deficient number, since it is larger than the sum of its proper divisors (5313925374746).

6642406718410 is a wasteful number, since it uses less digits than its factorization.

6642406718410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664240671848.

The product of its (nonzero) digits is 1548288, while the sum is 49.

The spelling of 6642406718410 in words is "six trillion, six hundred forty-two billion, four hundred six million, seven hundred eighteen thousand, four hundred ten".