603316612066661 has 2 divisors, whose sum is σ = 603316612066662. Its totient is φ = 603316612066660.

The previous prime is 603316612066643. The next prime is 603316612066711. The reversal of 603316612066661 is 166660216613306.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 417149171092900 + 186167440973761 = 20424230^2 + 13644319^2 .

It is a cyclic number.

It is not a de Polignac number, because 603316612066661 - 2²² = 603316607872357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (603316612066601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 301658306033330 + 301658306033331.

It is an arithmetic number, because the mean of its divisors is an integer number (301658306033331).

Almost surely, 2^{603316612066661} is an apocalyptic number.

It is an amenable number.

603316612066661 is a deficient number, since it is larger than the sum of its proper divisors (1).

603316612066661 is an equidigital number, since it uses as much as digits as its factorization.

603316612066661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5038848, while the sum is 53.

Adding to 603316612066661 its reverse (166660216613306), we get a palindrome (769976828679967).

The spelling of 603316612066661 in words is "six hundred three trillion, three hundred sixteen billion, six hundred twelve million, sixty-six thousand, six hundred sixty-one".