6557772 has 48 divisors (see below), whose sum is σ = 16658432. Its totient is φ = 1995840.

The previous prime is 6557753. The next prime is 6557777. The reversal of 6557772 is 2777556.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6557772.

It is not an unprimeable number, because it can be changed into a prime (6557777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19647 + ... + 19977.

Almost surely, 2^6557772 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 6557772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8329216).

6557772 is an abundant number, since it is smaller than the sum of its proper divisors (10100660).

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

6557772 is a wasteful number, since it uses less digits than its factorization.

6557772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 476 counting only the distinct ones).

The product of its digits is 102900, while the sum is 39.

The square root of 6557772 is about 2560.8147141096. The cubic root of 6557772 is about 187.1768371151.

The spelling of 6557772 in words is "six million, five hundred fifty-seven thousand, seven hundred seventy-two".