1166098065 has 32 divisors (see below), whose sum is σ = 2061158400. Its totient is φ = 558217920.

The previous prime is 1166098061. The next prime is 1166098067. The reversal of 1166098065 is 5608906611.

It is a happy number.

It is not a de Polignac number, because 1166098065 - 2² = 1166098061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1166098061) 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 31 ways as a sum of consecutive naturals, for example, 31695 + ... + 57764.

It is an arithmetic number, because the mean of its divisors is an integer number (64411200).

Almost surely, 2^1166098065 is an apocalyptic number.

1166098065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1166098065 is a deficient number, since it is larger than the sum of its proper divisors (895060335).

1166098065 is a wasteful number, since it uses less digits than its factorization.

1166098065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89557.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 1166098065 is about 34148.1780626727. The cubic root of 1166098065 is about 1052.5555483609. Note that the first 4 decimals are identical.

The spelling of 1166098065 in words is "one billion, one hundred sixty-six million, ninety-eight thousand, sixty-five".