6615625 has 24 divisors (see below), whose sum is σ = 8671320. Its totient is φ = 5040000.

The previous prime is 6615613. The next prime is 6615641. The reversal of 6615625 is 5265166.

It can be written as a sum of positive squares in 12 ways, for example, as 6568969 + 46656 = 2563^2 + 216^2 .

It is not a de Polignac number, because 6615625 - 2⁹ = 6615113 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90589 + ... + 90661.

It is an arithmetic number, because the mean of its divisors is an integer number (361305).

Almost surely, 2^6615625 is an apocalyptic number.

It is an amenable number.

6615625 is a deficient number, since it is larger than the sum of its proper divisors (2055695).

6615625 is an frugal number, since it uses more digits than its factorization.

6615625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 107 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 6615625 is about 2572.0857295199. The cubic root of 6615625 is about 187.7256542445.

The spelling of 6615625 in words is "six million, six hundred fifteen thousand, six hundred twenty-five".