15159666661 has 2 divisors, whose sum is σ = 15159666662. Its totient is φ = 15159666660.

The previous prime is 15159666659. The next prime is 15159666713. The reversal of 15159666661 is 16666695151.

It is an a-pointer prime, because the next prime (15159666713) can be obtained adding 15159666661 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7700062500 + 7459604161 = 87750^2 + 86369^2 .

It is a cyclic number.

It is not a de Polignac number, because 15159666661 - 2¹ = 15159666659 is a prime.

Together with 15159666659, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 15159666599 and 15159666608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15159666611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7579833330 + 7579833331.

It is an arithmetic number, because the mean of its divisors is an integer number (7579833331).

Almost surely, 2^15159666661 is an apocalyptic number.

It is an amenable number.

15159666661 is a deficient number, since it is larger than the sum of its proper divisors (1).

15159666661 is an equidigital number, since it uses as much as digits as its factorization.

15159666661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1749600, while the sum is 52.

The spelling of 15159666661 in words is "fifteen billion, one hundred fifty-nine million, six hundred sixty-six thousand, six hundred sixty-one".