1166261801 has 8 divisors (see below), whose sum is σ = 1191353184. Its totient is φ = 1141433440.

The previous prime is 1166261773. The next prime is 1166261809. The reversal of 1166261801 is 1081626611.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1166261801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1166261809) 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, 56780 + ... + 74541.

It is an arithmetic number, because the mean of its divisors is an integer number (148919148).

Almost surely, 2^1166261801 is an apocalyptic number.

It is an amenable number.

1166261801 is a deficient number, since it is larger than the sum of its proper divisors (25091383).

1166261801 is a wasteful number, since it uses less digits than its factorization.

1166261801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131511.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 1166261801 is about 34150.5754124290. The cubic root of 1166261801 is about 1052.6048104184.

The spelling of 1166261801 in words is "one billion, one hundred sixty-six million, two hundred sixty-one thousand, eight hundred one".