6641415660 has 48 divisors (see below), whose sum is σ = 20286508032. Its totient is φ = 1610040000.

The previous prime is 6641415617. The next prime is 6641415689. The reversal of 6641415660 is 665141466.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5030716 + ... + 5032035.

It is an arithmetic number, because the mean of its divisors is an integer number (422635584).

Almost surely, 2^6641415660 is an apocalyptic number.

6641415660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6641415660 is an abundant number, since it is smaller than the sum of its proper divisors (13645092372).

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

6641415660 is a wasteful number, since it uses less digits than its factorization.

6641415660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10062774 (or 10062772 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 6641415660 is about 81494.8811889434. The cubic root of 6641415660 is about 1879.6928406436.

The spelling of 6641415660 in words is "six billion, six hundred forty-one million, four hundred fifteen thousand, six hundred sixty".