6691103 has 4 divisors (see below), whose sum is σ = 6698328. Its totient is φ = 6683880.

The previous prime is 6691099. The next prime is 6691129. The reversal of 6691103 is 3011966.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3011966 = 2 ⋅1505983.

It is a cyclic number.

It is not a de Polignac number, because 6691103 - 2² = 6691099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6691163) 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, 1976 + ... + 4157.

It is an arithmetic number, because the mean of its divisors is an integer number (1674582).

Almost surely, 2^6691103 is an apocalyptic number.

6691103 is a deficient number, since it is larger than the sum of its proper divisors (7225).

6691103 is a wasteful number, since it uses less digits than its factorization.

6691103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7224.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 6691103 is about 2586.7166447062. The cubic root of 6691103 is about 188.4368800853.

The spelling of 6691103 in words is "six million, six hundred ninety-one thousand, one hundred three".