6646977 has 24 divisors (see below), whose sum is σ = 10131264. Its totient is φ = 4191264.

The previous prime is 6646973. The next prime is 6647009. The reversal of 6646977 is 7796466.

It is not a de Polignac number, because 6646977 - 2² = 6646973 is a prime.

It is a super-3 number, since 3×6646977³ (a number of 21 digits) contains 333 as substring.

It is an Ulam number.

6646977 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6646973) 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 23 ways as a sum of consecutive naturals, for example, 33643 + ... + 33839.

It is an arithmetic number, because the mean of its divisors is an integer number (422136).

Almost surely, 2^6646977 is an apocalyptic number.

It is an amenable number.

6646977 is a deficient number, since it is larger than the sum of its proper divisors (3484287).

6646977 is a wasteful number, since it uses less digits than its factorization.

6646977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 386 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 6646977 is about 2578.1731904587. The cubic root of 6646977 is about 188.0217362072.

The spelling of 6646977 in words is "six million, six hundred forty-six thousand, nine hundred seventy-seven".