6625806816 has 48 divisors (see below), whose sum is σ = 17407767888. Its totient is φ = 2206694400.

The previous prime is 6625806791. The next prime is 6625806827. The reversal of 6625806816 is 6186085266.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84156 + ... + 142596.

It is an arithmetic number, because the mean of its divisors is an integer number (362661831).

Almost surely, 2^6625806816 is an apocalyptic number.

It is an amenable number.

6625806816 is an abundant number, since it is smaller than the sum of its proper divisors (10781961072).

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

6625806816 is a wasteful number, since it uses less digits than its factorization.

6625806816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59635 (or 59627 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 6625806816 is about 81399.0590609007. The cubic root of 6625806816 is about 1878.2191163163.

The spelling of 6625806816 in words is "six billion, six hundred twenty-five million, eight hundred six thousand, eight hundred sixteen".