6665776 has 40 divisors (see below), whose sum is σ = 14131040. Its totient is φ = 3027456.

The previous prime is 6665773. The next prime is 6665777. The reversal of 6665776 is 6775666.

It is not an unprimeable number, because it can be changed into a prime (6665773) 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 7 ways as a sum of consecutive naturals, for example, 14965 + ... + 15403.

It is an arithmetic number, because the mean of its divisors is an integer number (353276).

Almost surely, 2^6665776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6665776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7065520).

6665776 is an abundant number, since it is smaller than the sum of its proper divisors (7465264).

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

6665776 is a wasteful number, since it uses less digits than its factorization.

6665776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533 (or 527 counting only the distinct ones).

The product of its digits is 317520, while the sum is 43.

The square root of 6665776 is about 2581.8164148521. The cubic root of 6665776 is about 188.1988239087.

The spelling of 6665776 in words is "six million, six hundred sixty-five thousand, seven hundred seventy-six".