1204060661 has 2 divisors, whose sum is σ = 1204060662. Its totient is φ = 1204060660.

The previous prime is 1204060643. The next prime is 1204060679. The reversal of 1204060661 is 1660604021.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1204060643) and next prime (1204060679).

It can be written as a sum of positive squares in only one way, i.e., 671328100 + 532732561 = 25910^2 + 23081^2 .

It is an emirp because it is prime and its reverse (1660604021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1204060661 - 2¹⁴ = 1204044277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1204060661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1204060601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602030330 + 602030331.

It is an arithmetic number, because the mean of its divisors is an integer number (602030331).

Almost surely, 2^1204060661 is an apocalyptic number.

It is an amenable number.

1204060661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1204060661 is an equidigital number, since it uses as much as digits as its factorization.

1204060661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1204060661 is about 34699.5772452634. The cubic root of 1204060661 is about 1063.8558575370.

Adding to 1204060661 its reverse (1660604021), we get a palindrome (2864664682).

The spelling of 1204060661 in words is "one billion, two hundred four million, sixty thousand, six hundred sixty-one".