6467783220 has 36 divisors (see below), whose sum is σ = 19618942980. Its totient is φ = 1724742144.

The previous prime is 6467783219. The next prime is 6467783227. The reversal of 6467783220 is 223877646.

It can be written as a sum of positive squares in 2 ways, for example, as 4003852176 + 2463931044 = 63276^2 + 49638^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6467783227) 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, 17965885 + ... + 17966244.

Almost surely, 2^6467783220 is an apocalyptic number.

6467783220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6467783220 is an abundant number, since it is smaller than the sum of its proper divisors (13151159760).

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

6467783220 is a wasteful number, since it uses less digits than its factorization.

6467783220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35932144 (or 35932139 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The square root of 6467783220 is about 80422.5293061590. The cubic root of 6467783220 is about 1863.1671499739.

The spelling of 6467783220 in words is "six billion, four hundred sixty-seven million, seven hundred eighty-three thousand, two hundred twenty".