1662603340553 has 2 divisors, whose sum is σ = 1662603340554. Its totient is φ = 1662603340552.

The previous prime is 1662603340547. The next prime is 1662603340591. The reversal of 1662603340553 is 3550433062661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1458884712649 + 203718627904 = 1207843^2 + 451352^2 .

It is a cyclic number.

It is not a de Polignac number, because 1662603340553 - 2⁴ = 1662603340537 is a prime.

It is not a weakly prime, because it can be changed into another prime (1662603640553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831301670276 + 831301670277.

It is an arithmetic number, because the mean of its divisors is an integer number (831301670277).

Almost surely, 2^{1662603340553} is an apocalyptic number.

It is an amenable number.

1662603340553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662603340553 is an equidigital number, since it uses as much as digits as its factorization.

1662603340553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1166400, while the sum is 44.

The spelling of 1662603340553 in words is "one trillion, six hundred sixty-two billion, six hundred three million, three hundred forty thousand, five hundred fifty-three".