6771638 has 24 divisors (see below), whose sum is σ = 10945368. Its totient is φ = 3140928.

The previous prime is 6771631. The next prime is 6771641. The reversal of 6771638 is 8361776.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6771631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59870 + ... + 59982.

It is an arithmetic number, because the mean of its divisors is an integer number (456057).

Almost surely, 2^6771638 is an apocalyptic number.

6771638 is a deficient number, since it is larger than the sum of its proper divisors (4173730).

6771638 is a wasteful number, since it uses less digits than its factorization.

6771638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 217 counting only the distinct ones).

The product of its digits is 42336, while the sum is 38.

The square root of 6771638 is about 2602.2371144844. The cubic root of 6771638 is about 189.1898840964.

The spelling of 6771638 in words is "six million, seven hundred seventy-one thousand, six hundred thirty-eight".