6505977 has 4 divisors (see below), whose sum is σ = 8674640. Its totient is φ = 4337316.

The previous prime is 6505973. The next prime is 6505991. The reversal of 6505977 is 7795056.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6505977 - 2² = 6505973 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6505973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1084327 + ... + 1084332.

It is an arithmetic number, because the mean of its divisors is an integer number (2168660).

Almost surely, 2^6505977 is an apocalyptic number.

It is an amenable number.

6505977 is a deficient number, since it is larger than the sum of its proper divisors (2168663).

6505977 is a wasteful number, since it uses less digits than its factorization.

6505977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168662.

The product of its (nonzero) digits is 66150, while the sum is 39.

The square root of 6505977 is about 2550.6816735924. The cubic root of 6505977 is about 186.6827434424.

The spelling of 6505977 in words is "six million, five hundred five thousand, nine hundred seventy-seven".