6625891888 has 320 divisors, whose sum is σ = 18193121280. Its totient is φ = 2258150400.

The previous prime is 6625891873. The next prime is 6625891889. The reversal of 6625891888 is 8881985266.

It is a super-2 number, since 2×6625891888² = 87804886622928409088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6625891889) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16689706 + ... + 16690102.

It is an arithmetic number, because the mean of its divisors is an integer number (56853504).

Almost surely, 2^6625891888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6625891888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9096560640).

6625891888 is an abundant number, since it is smaller than the sum of its proper divisors (11567229392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6625891888 is a wasteful number, since it uses less digits than its factorization.

6625891888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 490 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 61.

The square root of 6625891888 is about 81399.5816205464. The cubic root of 6625891888 is about 1878.2271547423.

The spelling of 6625891888 in words is "six billion, six hundred twenty-five million, eight hundred ninety-one thousand, eight hundred eighty-eight".