1302166661 has 2 divisors, whose sum is σ = 1302166662. Its totient is φ = 1302166660.

The previous prime is 1302166637. The next prime is 1302166667. The reversal of 1302166661 is 1666612031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 836944900 + 465221761 = 28930^2 + 21569^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1302166661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1302166667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651083330 + 651083331.

It is an arithmetic number, because the mean of its divisors is an integer number (651083331).

Almost surely, 2^1302166661 is an apocalyptic number.

It is an amenable number.

1302166661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1302166661 is an equidigital number, since it uses as much as digits as its factorization.

1302166661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 1302166661 is about 36085.5464278982. The cubic root of 1302166661 is about 1091.9988743185.

Adding to 1302166661 its reverse (1666612031), we get a palindrome (2968778692).

The spelling of 1302166661 in words is "one billion, three hundred two million, one hundred sixty-six thousand, six hundred sixty-one".