6687461 has 4 divisors (see below), whose sum is σ = 7295424. Its totient is φ = 6079500.

The previous prime is 6687451. The next prime is 6687463. The reversal of 6687461 is 1647866.

6687461 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 6687461 - 2¹⁰ = 6686437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6687463) 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 3 ways as a sum of consecutive naturals, for example, 303965 + ... + 303986.

It is an arithmetic number, because the mean of its divisors is an integer number (1823856).

Almost surely, 2^6687461 is an apocalyptic number.

6687461 is the 1157-th centered decagonal number.

It is an amenable number.

6687461 is a deficient number, since it is larger than the sum of its proper divisors (607963).

6687461 is a wasteful number, since it uses less digits than its factorization.

6687461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607962.

The product of its digits is 48384, while the sum is 38.

The square root of 6687461 is about 2586.0125676415. The cubic root of 6687461 is about 188.4026848427.

The spelling of 6687461 in words is "six million, six hundred eighty-seven thousand, four hundred sixty-one".