6620625 has 60 divisors (see below), whose sum is σ = 13158288. Its totient is φ = 3180000.

The previous prime is 6620617. The next prime is 6620629. The reversal of 6620625 is 5260266.

It is not a de Polignac number, because 6620625 - 2³ = 6620617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6620629) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 61822 + ... + 61928.

Almost surely, 2^6620625 is an apocalyptic number.

It is an amenable number.

6620625 is a deficient number, since it is larger than the sum of its proper divisors (6537663).

6620625 is a wasteful number, since it uses less digits than its factorization.

6620625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 6620625 is about 2573.0575197613. The cubic root of 6620625 is about 187.7729358394.

The spelling of 6620625 in words is "six million, six hundred twenty thousand, six hundred twenty-five".