6625105664 has 36 divisors (see below), whose sum is σ = 13230648480. Its totient is φ = 3310970880.

The previous prime is 6625105661. The next prime is 6625105691. The reversal of 6625105664 is 4665015266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6625105661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678932 + ... + 688620.

Almost surely, 2^6625105664 is an apocalyptic number.

6625105664 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6625105664 is a deficient number, since it is larger than the sum of its proper divisors (6605542816).

6625105664 is an equidigital number, since it uses as much as digits as its factorization.

6625105664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12376 (or 12362 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The square root of 6625105664 is about 81394.7520667027. The cubic root of 6625105664 is about 1878.1528620682.

The spelling of 6625105664 in words is "six billion, six hundred twenty-five million, one hundred five thousand, six hundred sixty-four".