6881945 has 32 divisors (see below), whose sum is σ = 10063872. Its totient is φ = 4416192.

The previous prime is 6881939. The next prime is 6881947. The reversal of 6881945 is 5491886.

It is a cyclic number.

It is not a de Polignac number, because 6881945 - 2¹⁴ = 6865561 is a prime.

It is a super-2 number, since 2×6881945² = 94722333966050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6881947) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66764 + ... + 66866.

It is an arithmetic number, because the mean of its divisors is an integer number (314496).

Almost surely, 2^6881945 is an apocalyptic number.

It is an amenable number.

6881945 is a deficient number, since it is larger than the sum of its proper divisors (3181927).

6881945 is a wasteful number, since it uses less digits than its factorization.

6881945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221.

The product of its digits is 69120, while the sum is 41.

The square root of 6881945 is about 2623.3461456697. The cubic root of 6881945 is about 190.2116293807.

The spelling of 6881945 in words is "six million, eight hundred eighty-one thousand, nine hundred forty-five".