1106656561 has 2 divisors, whose sum is σ = 1106656562. Its totient is φ = 1106656560.

The previous prime is 1106656549. The next prime is 1106656583. The reversal of 1106656561 is 1656566011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 858783025 + 247873536 = 29305^2 + 15744^2 .

It is an emirp because it is prime and its reverse (1656566011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1106656561 - 2¹¹ = 1106654513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1106656561.

It is not a weakly prime, because it can be changed into another prime (1106656511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 553328280 + 553328281.

It is an arithmetic number, because the mean of its divisors is an integer number (553328281).

Almost surely, 2^1106656561 is an apocalyptic number.

It is an amenable number.

1106656561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1106656561 is an equidigital number, since it uses as much as digits as its factorization.

1106656561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 1106656561 is about 33266.4479769031. The cubic root of 1106656561 is about 1034.3581825240.

The spelling of 1106656561 in words is "one billion, one hundred six million, six hundred fifty-six thousand, five hundred sixty-one".