6557299056 has 320 divisors, whose sum is σ = 24227020800. Its totient is φ = 1647993600.

The previous prime is 6557299033. The next prime is 6557299097. The reversal of 6557299056 is 6509927556.

It is a happy number.

6557299056 is a `hidden beast` number, since 65 + 572 + 9 + 9 + 0 + 5 + 6 = 666.

It is a super-2 number, since 2×6557299056² = 85996341819636982272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 6557298993 and 6557299011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1028005 + ... + 1034363.

It is an arithmetic number, because the mean of its divisors is an integer number (75709440).

Almost surely, 2^6557299056 is an apocalyptic number.

6557299056 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6557299056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12113510400).

6557299056 is an abundant number, since it is smaller than the sum of its proper divisors (17669721744).

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

6557299056 is a wasteful number, since it uses less digits than its factorization.

6557299056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6425 (or 6413 counting only the distinct ones).

The product of its (nonzero) digits is 5103000, while the sum is 54.

The square root of 6557299056 is about 80977.1514440956. The cubic root of 6557299056 is about 1871.7233729971.

The spelling of 6557299056 in words is "six billion, five hundred fifty-seven million, two hundred ninety-nine thousand, fifty-six".