6642783 has 24 divisors (see below), whose sum is σ = 11450160. Its totient is φ = 3795120.

The previous prime is 6642763. The next prime is 6642793. The reversal of 6642783 is 3872466.

6642783 is a `hidden beast` number, since 6 + 642 + 7 + 8 + 3 = 666.

It is not a de Polignac number, because 6642783 - 2¹⁷ = 6511711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642763) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1188 + ... + 3833.

It is an arithmetic number, because the mean of its divisors is an integer number (477090).

Almost surely, 2^6642783 is an apocalyptic number.

6642783 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

6642783 is a deficient number, since it is larger than the sum of its proper divisors (4807377).

6642783 is a wasteful number, since it uses less digits than its factorization.

6642783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5044 (or 5031 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 6642783 is about 2577.3596955024. The cubic root of 6642783 is about 187.9821829350.

It can be divided in two parts, 66 and 42783, that added together give a square (42849 = 207²).

The spelling of 6642783 in words is "six million, six hundred forty-two thousand, seven hundred eighty-three".