663785777093 has 2 divisors, whose sum is σ = 663785777094. Its totient is φ = 663785777092.

The previous prime is 663785777027. The next prime is 663785777101. The reversal of 663785777093 is 390777587366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388536548929 + 275249228164 = 623327^2 + 524642^2 .

It is a cyclic number.

It is not a de Polignac number, because 663785777093 - 2¹⁶ = 663785711557 is a prime.

It is a super-2 number, since 2×663785777093² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663781777093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331892888546 + 331892888547.

It is an arithmetic number, because the mean of its divisors is an integer number (331892888547).

Almost surely, 2^663785777093 is an apocalyptic number.

It is an amenable number.

663785777093 is a deficient number, since it is larger than the sum of its proper divisors (1).

663785777093 is an equidigital number, since it uses as much as digits as its factorization.

663785777093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280052640, while the sum is 68.

The spelling of 663785777093 in words is "six hundred sixty-three billion, seven hundred eighty-five million, seven hundred seventy-seven thousand, ninety-three".