6557430 has 64 divisors (see below), whose sum is σ = 17750016. Its totient is φ = 1536000.

The previous prime is 6557429. The next prime is 6557459. The reversal of 6557430 is 347556.

6557430 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9910 + ... + 10550.

It is an arithmetic number, because the mean of its divisors is an integer number (277344).

Almost surely, 2^6557430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6557430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8875008).

6557430 is an abundant number, since it is smaller than the sum of its proper divisors (11192586).

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

6557430 is a wasteful number, since it uses less digits than its factorization.

6557430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693.

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 6557430 is about 2560.7479376151. The cubic root of 6557430 is about 187.1735831852.

The spelling of 6557430 in words is "six million, five hundred fifty-seven thousand, four hundred thirty".