5665501555997 has 2 divisors, whose sum is σ = 5665501555998. Its totient is φ = 5665501555996.

The previous prime is 5665501555993. The next prime is 5665501556003. The reversal of 5665501555997 is 7995551055665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5227378031716 + 438123524281 = 2286346^2 + 661909^2 .

It is a cyclic number.

It is not a de Polignac number, because 5665501555997 - 2² = 5665501555993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5665501555993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2832750777998 + 2832750777999.

It is an arithmetic number, because the mean of its divisors is an integer number (2832750777999).

Almost surely, 2^{5665501555997} is an apocalyptic number.

It is an amenable number.

5665501555997 is a deficient number, since it is larger than the sum of its proper divisors (1).

5665501555997 is an equidigital number, since it uses as much as digits as its factorization.

5665501555997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 318937500, while the sum is 68.

The spelling of 5665501555997 in words is "five trillion, six hundred sixty-five billion, five hundred one million, five hundred fifty-five thousand, nine hundred ninety-seven".