6625075021 has 16 divisors (see below), whose sum is σ = 7128576000. Its totient is φ = 6137298288.

The previous prime is 6625074961. The next prime is 6625075033. The reversal of 6625075021 is 1205705266.

It is a cyclic number.

It is not a de Polignac number, because 6625075021 - 2⁹ = 6625074509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6625075421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1246656 + ... + 1251958.

It is an arithmetic number, because the mean of its divisors is an integer number (445536000).

Almost surely, 2^6625075021 is an apocalyptic number.

It is an amenable number.

6625075021 is a deficient number, since it is larger than the sum of its proper divisors (503500979).

6625075021 is a wasteful number, since it uses less digits than its factorization.

6625075021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6768.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 6625075021 is about 81394.5638295335. The cubic root of 6625075021 is about 1878.1499663998.

The spelling of 6625075021 in words is "six billion, six hundred twenty-five million, seventy-five thousand, twenty-one".