6646436514 has 24 divisors (see below), whose sum is σ = 14897186460. Its totient is φ = 2139082848.

The previous prime is 6646436497. The next prime is 6646436551. The reversal of 6646436514 is 4156346466.

6646436514 is a `hidden beast` number, since 66 + 46 + 4 + 36 + 514 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6646325625 + 110889 = 81525^2 + 333^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6646436514.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6365797 + ... + 6366840.

Almost surely, 2^6646436514 is an apocalyptic number.

6646436514 is an abundant number, since it is smaller than the sum of its proper divisors (8250749946).

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

6646436514 is a wasteful number, since it uses less digits than its factorization.

6646436514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12732674 (or 12732671 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 45.

The square root of 6646436514 is about 81525.6800891596. The cubic root of 6646436514 is about 1880.1663986186.

The spelling of 6646436514 in words is "six billion, six hundred forty-six million, four hundred thirty-six thousand, five hundred fourteen".