6651625 has 16 divisors (see below), whose sum is σ = 8386560. Its totient is φ = 5266800.

The previous prime is 6651587. The next prime is 6651647. The reversal of 6651625 is 5261566.

It is not a de Polignac number, because 6651625 - 2⁷ = 6651497 is a prime.

6651625 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15666 + ... + 16084.

It is an arithmetic number, because the mean of its divisors is an integer number (524160).

Almost surely, 2^6651625 is an apocalyptic number.

It is an amenable number.

6651625 is a deficient number, since it is larger than the sum of its proper divisors (1734935).

6651625 is a wasteful number, since it uses less digits than its factorization.

6651625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561 (or 551 counting only the distinct ones).

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

The square root of 6651625 is about 2579.0744463858. The cubic root of 6651625 is about 188.0655516844.

The spelling of 6651625 in words is "six million, six hundred fifty-one thousand, six hundred twenty-five".