604066555621 has 2 divisors, whose sum is σ = 604066555622. Its totient is φ = 604066555620.

The previous prime is 604066555553. The next prime is 604066555637. The reversal of 604066555621 is 126555660406.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 597389868100 + 6676687521 = 772910^2 + 81711^2 .

It is a cyclic number.

It is not a de Polignac number, because 604066555621 - 2¹⁹ = 604066031333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (604066555661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302033277810 + 302033277811.

It is an arithmetic number, because the mean of its divisors is an integer number (302033277811).

Almost surely, 2^604066555621 is an apocalyptic number.

It is an amenable number.

604066555621 is a deficient number, since it is larger than the sum of its proper divisors (1).

604066555621 is an equidigital number, since it uses as much as digits as its factorization.

604066555621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 604066555621 in words is "six hundred four billion, sixty-six million, five hundred fifty-five thousand, six hundred twenty-one".