1168901661 has 8 divisors (see below), whose sum is σ = 1567545120. Its totient is φ = 774762992.

The previous prime is 1168901633. The next prime is 1168901681. The reversal of 1168901661 is 1661098611.

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 1168901661 - 2⁶ = 1168901597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1168901611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1125591 + ... + 1126628.

It is an arithmetic number, because the mean of its divisors is an integer number (195943140).

Almost surely, 2^1168901661 is an apocalyptic number.

It is an amenable number.

1168901661 is a deficient number, since it is larger than the sum of its proper divisors (398643459).

1168901661 is a wasteful number, since it uses less digits than its factorization.

1168901661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252395.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 1168901661 is about 34189.2038661329. The cubic root of 1168901661 is about 1053.3984102181.

The spelling of 1168901661 in words is "one billion, one hundred sixty-eight million, nine hundred one thousand, six hundred sixty-one".