6438807660 has 48 divisors (see below), whose sum is σ = 18043443936. Its totient is φ = 1715607552.

The previous prime is 6438807653. The next prime is 6438807667. The reversal of 6438807660 is 667088346.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6438807653) and next prime (6438807667).

It is not an unprimeable number, because it can be changed into a prime (6438807667) 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, 30844 + ... + 117596.

It is an arithmetic number, because the mean of its divisors is an integer number (375905082).

Almost surely, 2^6438807660 is an apocalyptic number.

6438807660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6438807660 is an abundant number, since it is smaller than the sum of its proper divisors (11604636276).

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

6438807660 is a wasteful number, since it uses less digits than its factorization.

6438807660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88002 (or 88000 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The square root of 6438807660 is about 80242.1813013580. The cubic root of 6438807660 is about 1860.3806655267.

The spelling of 6438807660 in words is "six billion, four hundred thirty-eight million, eight hundred seven thousand, six hundred sixty".