1206660619663 has 2 divisors, whose sum is σ = 1206660619664. Its totient is φ = 1206660619662.

The previous prime is 1206660619649. The next prime is 1206660619733. The reversal of 1206660619663 is 3669160666021.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1206660619663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1206660619663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1206660619643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603330309831 + 603330309832.

It is an arithmetic number, because the mean of its divisors is an integer number (603330309832).

Almost surely, 2^{1206660619663} is an apocalyptic number.

1206660619663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1206660619663 is an equidigital number, since it uses as much as digits as its factorization.

1206660619663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2519424, while the sum is 52.

The spelling of 1206660619663 in words is "one trillion, two hundred six billion, six hundred sixty million, six hundred nineteen thousand, six hundred sixty-three".