6625945 has 8 divisors (see below), whose sum is σ = 7965000. Its totient is φ = 5291520.

The previous prime is 6625943. The next prime is 6625979. The reversal of 6625945 is 5495266.

It can be written as a sum of positive squares in 4 ways, for example, as 808201 + 5817744 = 899^2 + 2412^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6625945 - 2¹ = 6625943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6625943) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4681 + ... + 5929.

It is an arithmetic number, because the mean of its divisors is an integer number (995625).

Almost surely, 2^6625945 is an apocalyptic number.

It is an amenable number.

6625945 is a deficient number, since it is larger than the sum of its proper divisors (1339055).

6625945 is a wasteful number, since it uses less digits than its factorization.

6625945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315.

The product of its digits is 64800, while the sum is 37.

The square root of 6625945 is about 2574.0911017289. The cubic root of 6625945 is about 187.8232173243.

The spelling of 6625945 in words is "six million, six hundred twenty-five thousand, nine hundred forty-five".