6691071 has 8 divisors (see below), whose sum is σ = 9209344. Its totient is φ = 4316760.

The previous prime is 6691057. The next prime is 6691073. The reversal of 6691071 is 1701966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6691071 - 2⁵ = 6691039 is a prime.

It is a super-2 number, since 2×6691071² = 89540862254082, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6691073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35881 + ... + 36066.

It is an arithmetic number, because the mean of its divisors is an integer number (1151168).

Almost surely, 2^6691071 is an apocalyptic number.

6691071 is a deficient number, since it is larger than the sum of its proper divisors (2518273).

6691071 is a wasteful number, since it uses less digits than its factorization.

6691071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71981.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 6691071 is about 2586.7104592513. The cubic root of 6691071 is about 188.4365796869.

The spelling of 6691071 in words is "six million, six hundred ninety-one thousand, seventy-one".