6543780 has 24 divisors (see below), whose sum is σ = 18322752. Its totient is φ = 1744992.

The previous prime is 6543773. The next prime is 6543781. The reversal of 6543780 is 873456.

It is not an unprimeable number, because it can be changed into a prime (6543781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54472 + ... + 54591.

It is an arithmetic number, because the mean of its divisors is an integer number (763448).

Almost surely, 2^6543780 is an apocalyptic number.

6543780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6543780 is an abundant number, since it is smaller than the sum of its proper divisors (11778972).

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

6543780 is a wasteful number, since it uses less digits than its factorization.

6543780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109075 (or 109073 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 6543780 is about 2558.0813122338. The cubic root of 6543780 is about 187.0436189439.

The spelling of 6543780 in words is "six million, five hundred forty-three thousand, seven hundred eighty".