6611661167 has 4 divisors (see below), whose sum is σ = 6899124720. Its totient is φ = 6324197616.

The previous prime is 6611661163. The next prime is 6611661187. The reversal of 6611661167 is 7611661166.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7611661166 = 2 ⋅3805830583.

It is a cyclic number.

It is not a de Polignac number, because 6611661167 - 2² = 6611661163 is a prime.

It is a super-3 number, since 3×6611661167³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6611661163) 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, 143731742 + ... + 143731787.

It is an arithmetic number, because the mean of its divisors is an integer number (1724781180).

Almost surely, 2^6611661167 is an apocalyptic number.

6611661167 is a deficient number, since it is larger than the sum of its proper divisors (287463553).

6611661167 is a wasteful number, since it uses less digits than its factorization.

6611661167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287463552.

The product of its digits is 54432, while the sum is 41.

The square root of 6611661167 is about 81312.1218945859. The cubic root of 6611661167 is about 1876.8815404322.

Subtracting 6611661167 from its reverse (7611661166), we obtain a palindrome (999999999).

The spelling of 6611661167 in words is "six billion, six hundred eleven million, six hundred sixty-one thousand, one hundred sixty-seven".