1166121671 has 8 divisors (see below), whose sum is σ = 1369989264. Its totient is φ = 978563520.

The previous prime is 1166121611. The next prime is 1166121701. The reversal of 1166121671 is 1761216611.

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

It is not a de Polignac number, because 1166121671 - 2²² = 1161927367 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 (1166121611) 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, 4077206 + ... + 4077491.

It is an arithmetic number, because the mean of its divisors is an integer number (171248658).

Almost surely, 2^1166121671 is an apocalyptic number.

1166121671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1166121671 is a deficient number, since it is larger than the sum of its proper divisors (203867593).

1166121671 is a wasteful number, since it uses less digits than its factorization.

1166121671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8154721.

The product of its digits is 3024, while the sum is 32.

The square root of 1166121671 is about 34148.5237016185. The cubic root of 1166121671 is about 1052.5626508106.

The spelling of 1166121671 in words is "one billion, one hundred sixty-six million, one hundred twenty-one thousand, six hundred seventy-one".