1166100257 has 4 divisors (see below), whose sum is σ = 1332686016. Its totient is φ = 999514500.

The previous prime is 1166100241. The next prime is 1166100259. The reversal of 1166100257 is 7520016611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7520016611 = 31 ⋅242581181.

It is a cyclic number.

It is not a de Polignac number, because 1166100257 - 2⁴ = 1166100241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166100259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83292869 + ... + 83292882.

It is an arithmetic number, because the mean of its divisors is an integer number (333171504).

Almost surely, 2^1166100257 is an apocalyptic number.

It is an amenable number.

1166100257 is a deficient number, since it is larger than the sum of its proper divisors (166585759).

1166100257 is an equidigital number, since it uses as much as digits as its factorization.

1166100257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166585758.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 1166100257 is about 34148.2101580742. The cubic root of 1166100257 is about 1052.5562078825.

Adding to 1166100257 its reverse (7520016611), we get a palindrome (8686116868).

The spelling of 1166100257 in words is "one billion, one hundred sixty-six million, one hundred thousand, two hundred fifty-seven".