1161665051 has 2 divisors, whose sum is σ = 1161665052. Its totient is φ = 1161665050.

The previous prime is 1161665039. The next prime is 1161665083. The reversal of 1161665051 is 1505661611.

It is an a-pointer prime, because the next prime (1161665083) can be obtained adding 1161665051 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1161665051 - 2¹⁰ = 1161664027 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1161664999 and 1161665017.

It is not a weakly prime, because it can be changed into another prime (1161665251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580832525 + 580832526.

It is an arithmetic number, because the mean of its divisors is an integer number (580832526).

Almost surely, 2^1161665051 is an apocalyptic number.

1161665051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161665051 is an equidigital number, since it uses as much as digits as its factorization.

1161665051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 1161665051 is about 34083.2077568999. The cubic root of 1161665051 is about 1051.2200635632.

It can be divided in two parts, 11616 and 65051, that added together give a palindrome (76667).

The spelling of 1161665051 in words is "one billion, one hundred sixty-one million, six hundred sixty-five thousand, fifty-one".