6557746020 has 96 divisors (see below), whose sum is σ = 21280444416. Its totient is φ = 1477795200.

The previous prime is 6557745973. The next prime is 6557746033. The reversal of 6557746020 is 206477556.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80136 + ... + 139775.

It is an arithmetic number, because the mean of its divisors is an integer number (221671296).

Almost surely, 2^6557746020 is an apocalyptic number.

6557746020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6557746020 is an abundant number, since it is smaller than the sum of its proper divisors (14722698396).

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

6557746020 is a wasteful number, since it uses less digits than its factorization.

6557746020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220001 (or 219999 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 42.

The square root of 6557746020 is about 80979.9112125964. The cubic root of 6557746020 is about 1871.7658993457.

The spelling of 6557746020 in words is "six billion, five hundred fifty-seven million, seven hundred forty-six thousand, twenty".