1164951665 has 4 divisors (see below), whose sum is σ = 1397942004. Its totient is φ = 931961328.

The previous prime is 1164951661. The next prime is 1164951677. The reversal of 1164951665 is 5661594611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 283989904 + 880961761 = 16852^2 + 29681^2 .

It is a cyclic number.

It is not a de Polignac number, because 1164951665 - 2² = 1164951661 is a prime.

It is a super-2 number, since 2×1164951665² = 2714224763572544450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1164951661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116495162 + ... + 116495171.

It is an arithmetic number, because the mean of its divisors is an integer number (349485501).

Almost surely, 2^1164951665 is an apocalyptic number.

It is an amenable number.

1164951665 is a deficient number, since it is larger than the sum of its proper divisors (232990339).

1164951665 is an equidigital number, since it uses as much as digits as its factorization.

1164951665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232990338.

The product of its digits is 194400, while the sum is 44.

The square root of 1164951665 is about 34131.3882665209. The cubic root of 1164951665 is about 1052.2105101075.

The spelling of 1164951665 in words is "one billion, one hundred sixty-four million, nine hundred fifty-one thousand, six hundred sixty-five".