6581982 has 32 divisors (see below), whose sum is σ = 14828544. Its totient is φ = 1929600.

The previous prime is 6581977. The next prime is 6581987. The reversal of 6581982 is 2891856.

It is an interprime number because it is at equal distance from previous prime (6581977) and next prime (6581987).

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 6581982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6581987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 438 + ... + 3654.

It is an arithmetic number, because the mean of its divisors is an integer number (463392).

Almost surely, 2^6581982 is an apocalyptic number.

6581982 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6581982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7414272).

6581982 is an abundant number, since it is smaller than the sum of its proper divisors (8246562).

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

6581982 is a wasteful number, since it uses less digits than its factorization.

6581982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3264.

The product of its digits is 34560, while the sum is 39.

The square root of 6581982 is about 2565.5373706107. The cubic root of 6581982 is about 187.4068942191.

The spelling of 6581982 in words is "six million, five hundred eighty-one thousand, nine hundred eighty-two".