1167171006661 has 8 divisors (see below), whose sum is σ = 1328637351744. Its totient is φ = 1014931309920.

The previous prime is 1167171006653. The next prime is 1167171006779. The reversal of 1167171006661 is 1666001717611.

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

It is not a de Polignac number, because 1167171006661 - 2³ = 1167171006653 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 (1167171006641) 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, 2306661816 + ... + 2306662321.

It is an arithmetic number, because the mean of its divisors is an integer number (166079668968).

Almost surely, 2^{1167171006661} is an apocalyptic number.

1167171006661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1167171006661 is a deficient number, since it is larger than the sum of its proper divisors (161466345083).

1167171006661 is a wasteful number, since it uses less digits than its factorization.

1167171006661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4613324171.

The product of its (nonzero) digits is 63504, while the sum is 43.

The spelling of 1167171006661 in words is "one trillion, one hundred sixty-seven billion, one hundred seventy-one million, six thousand, six hundred sixty-one".