6522780 has 48 divisors (see below), whose sum is σ = 19926144. Its totient is φ = 1581120.

The previous prime is 6522779. The next prime is 6522787. The reversal of 6522780 is 872256.

6522780 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 zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6522787) 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, 4282 + ... + 5601.

It is an arithmetic number, because the mean of its divisors is an integer number (415128).

Almost surely, 2^6522780 is an apocalyptic number.

6522780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6522780 is an abundant number, since it is smaller than the sum of its proper divisors (13403364).

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

6522780 is a wasteful number, since it uses less digits than its factorization.

6522780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9906 (or 9904 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 6522780 is about 2553.9733749591. The cubic root of 6522780 is about 186.8433205808.

The spelling of 6522780 in words is "six million, five hundred twenty-two thousand, seven hundred eighty".