6641663052 has 12 divisors (see below), whose sum is σ = 15497213816. Its totient is φ = 2213887680.

The previous prime is 6641663029. The next prime is 6641663053. The reversal of 6641663052 is 2503661466.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×6641663052² = 88223376192603909408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6641663052.

It is not an unprimeable number, because it can be changed into a prime (6641663053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276735949 + ... + 276735972.

Almost surely, 2^6641663052 is an apocalyptic number.

It is an amenable number.

6641663052 is an abundant number, since it is smaller than the sum of its proper divisors (8855550764).

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

6641663052 is a wasteful number, since it uses less digits than its factorization.

6641663052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553471928 (or 553471926 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 6641663052 is about 81496.3990124717. The cubic root of 6641663052 is about 1879.7161798041.

The spelling of 6641663052 in words is "six billion, six hundred forty-one million, six hundred sixty-three thousand, fifty-two".