6257664 has 132 divisors (see below), whose sum is σ = 20863024. Its totient is φ = 1769472.

The previous prime is 6257663. The next prime is 6257677. The reversal of 6257664 is 4667526.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6257663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64464 + ... + 64560.

Almost surely, 2^6257664 is an apocalyptic number.

6257664 is a gapful number since it is divisible by the number (64) 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 6257664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10431512).

6257664 is an abundant number, since it is smaller than the sum of its proper divisors (14605360).

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

6257664 is a wasteful number, since it uses less digits than its factorization.

6257664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 109 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 6257664 is about 2501.5323303927. The cubic root of 6257664 is about 184.2768359575.

The spelling of 6257664 in words is "six million, two hundred fifty-seven thousand, six hundred sixty-four".