6681951 has 6 divisors (see below), whose sum is σ = 9651720. Its totient is φ = 4454628.

The previous prime is 6681949. The next prime is 6681953. The reversal of 6681951 is 1591866.

It is an interprime number because it is at equal distance from previous prime (6681949) and next prime (6681953).

It is not a de Polignac number, because 6681951 - 2¹ = 6681949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6681953) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 371211 + ... + 371228.

It is an arithmetic number, because the mean of its divisors is an integer number (1608620).

Almost surely, 2^6681951 is an apocalyptic number.

6681951 is a deficient number, since it is larger than the sum of its proper divisors (2969769).

6681951 is a wasteful number, since it uses less digits than its factorization.

6681951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742445 (or 742442 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 6681951 is about 2584.9470013909. The cubic root of 6681951 is about 188.3509270813.

The spelling of 6681951 in words is "six million, six hundred eighty-one thousand, nine hundred fifty-one".