6640572 has 24 divisors (see below), whose sum is σ = 15995392. Its totient is φ = 2142000.

The previous prime is 6640567. The next prime is 6640577. The reversal of 6640572 is 2750466.

It is an interprime number because it is at equal distance from previous prime (6640567) and next prime (6640577).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8554 + ... + 9297.

Almost surely, 2^6640572 is an apocalyptic number.

6640572 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

6640572 is an abundant number, since it is smaller than the sum of its proper divisors (9354820).

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

6640572 is a wasteful number, since it uses less digits than its factorization.

6640572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17889 (or 17887 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 6640572 is about 2576.9307324800. The cubic root of 6640572 is about 187.9613244721.

The spelling of 6640572 in words is "six million, six hundred forty thousand, five hundred seventy-two".