1166172641 has 8 divisors (see below), whose sum is σ = 1182718080. Its totient is φ = 1149671952.

The previous prime is 1166172617. The next prime is 1166172643. The reversal of 1166172641 is 1462716611.

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

It is a cyclic number.

It is not a de Polignac number, because 1166172641 - 2⁶ = 1166172577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166172643) 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, 43151 + ... + 64763.

It is an arithmetic number, because the mean of its divisors is an integer number (147839760).

Almost surely, 2^1166172641 is an apocalyptic number.

It is an amenable number.

1166172641 is a deficient number, since it is larger than the sum of its proper divisors (16545439).

1166172641 is an equidigital number, since it uses as much as digits as its factorization.

1166172641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22375.

The product of its digits is 12096, while the sum is 35.

The square root of 1166172641 is about 34149.2699921975. The cubic root of 1166172641 is about 1052.5779860705.

The spelling of 1166172641 in words is "one billion, one hundred sixty-six million, one hundred seventy-two thousand, six hundred forty-one".