6641765328 has 40 divisors (see below), whose sum is σ = 18717703776. Its totient is φ = 2012656000.

The previous prime is 6641765293. The next prime is 6641765359. The reversal of 6641765328 is 8235671466.

It is a super-2 number, since 2×6641765328² = 88226093344445895168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6289023 + ... + 6290078.

Almost surely, 2^6641765328 is an apocalyptic number.

It is an amenable number.

6641765328 is an abundant number, since it is smaller than the sum of its proper divisors (12075938448).

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

6641765328 is a wasteful number, since it uses less digits than its factorization.

6641765328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12579123 (or 12579117 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 48.

The square root of 6641765328 is about 81497.0264979036. The cubic root of 6641765328 is about 1879.7258284350.

The spelling of 6641765328 in words is "six billion, six hundred forty-one million, seven hundred sixty-five thousand, three hundred twenty-eight".