6625645255 has 4 divisors (see below), whose sum is σ = 7950774312. Its totient is φ = 5300516200.

The previous prime is 6625645219. The next prime is 6625645261. The reversal of 6625645255 is 5525465266.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6625645255 - 2¹¹ = 6625643207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662564521 + ... + 662564530.

It is an arithmetic number, because the mean of its divisors is an integer number (1987693578).

Almost surely, 2^6625645255 is an apocalyptic number.

6625645255 is a deficient number, since it is larger than the sum of its proper divisors (1325129057).

6625645255 is a wasteful number, since it uses less digits than its factorization.

6625645255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325129056.

The product of its digits is 2160000, while the sum is 46.

The square root of 6625645255 is about 81398.0666539446. The cubic root of 6625645255 is about 1878.2038502798.

The spelling of 6625645255 in words is "six billion, six hundred twenty-five million, six hundred forty-five thousand, two hundred fifty-five".