1166899005 has 24 divisors (see below), whose sum is σ = 2023476000. Its totient is φ = 622084320.

The previous prime is 1166898979. The next prime is 1166899009. The reversal of 1166899005 is 5009986611.

It is not a de Polignac number, because 1166899005 - 2¹⁰ = 1166897981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166899009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153750 + ... + 161160.

It is an arithmetic number, because the mean of its divisors is an integer number (84311500).

Almost surely, 2^1166899005 is an apocalyptic number.

1166899005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1166899005 is a deficient number, since it is larger than the sum of its proper divisors (856576995).

1166899005 is a wasteful number, since it uses less digits than its factorization.

1166899005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10921 (or 10918 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 1166899005 is about 34159.9034688332. The cubic root of 1166899005 is about 1052.7964774691.

The spelling of 1166899005 in words is "one billion, one hundred sixty-six million, eight hundred ninety-nine thousand, five".