6641887960 has 16 divisors (see below), whose sum is σ = 14944248000. Its totient is φ = 2656755168.

The previous prime is 6641887943. The next prime is 6641887961. The reversal of 6641887960 is 697881466.

It is a happy number.

It is a super-2 number, since 2×6641887960² = 88229351346385923200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6641887961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83023560 + ... + 83023639.

It is an arithmetic number, because the mean of its divisors is an integer number (934015500).

Almost surely, 2^6641887960 is an apocalyptic number.

It is an amenable number.

6641887960 is an abundant number, since it is smaller than the sum of its proper divisors (8302360040).

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

6641887960 is a wasteful number, since it uses less digits than its factorization.

6641887960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166047210 (or 166047206 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 55.

The square root of 6641887960 is about 81497.7788654390. The cubic root of 6641887960 is about 1879.7373973030.

The spelling of 6641887960 in words is "six billion, six hundred forty-one million, eight hundred eighty-seven thousand, nine hundred sixty".