6687481 has 4 divisors (see below), whose sum is σ = 6752512. Its totient is φ = 6622452.

The previous prime is 6687463. The next prime is 6687497. The reversal of 6687481 is 1847866.

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 6687481 - 2⁷ = 6687353 is a prime.

It is a super-2 number, since 2×6687481² = 89444804250722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6687451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32361 + ... + 32566.

It is an arithmetic number, because the mean of its divisors is an integer number (1688128).

Almost surely, 2^6687481 is an apocalyptic number.

It is an amenable number.

6687481 is a deficient number, since it is larger than the sum of its proper divisors (65031).

6687481 is a wasteful number, since it uses less digits than its factorization.

6687481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65030.

The product of its digits is 64512, while the sum is 40.

The square root of 6687481 is about 2586.0164345959. The cubic root of 6687481 is about 188.4028726593.

The spelling of 6687481 in words is "six million, six hundred eighty-seven thousand, four hundred eighty-one".