6675487771661 has 2 divisors, whose sum is σ = 6675487771662. Its totient is φ = 6675487771660.

The previous prime is 6675487771643. The next prime is 6675487771739. The reversal of 6675487771661 is 1661777845766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3695548709161 + 2979939062500 = 1922381^2 + 1726250^2 .

It is a cyclic number.

It is not a de Polignac number, because 6675487771661 - 2³⁰ = 6674414029837 is a prime.

It is a super-3 number, since 3×6675487771661³ (a number of 39 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6675487771061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3337743885830 + 3337743885831.

It is an arithmetic number, because the mean of its divisors is an integer number (3337743885831).

Almost surely, 2^{6675487771661} is an apocalyptic number.

It is an amenable number.

6675487771661 is a deficient number, since it is larger than the sum of its proper divisors (1).

6675487771661 is an equidigital number, since it uses as much as digits as its factorization.

6675487771661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497871360, while the sum is 71.

The spelling of 6675487771661 in words is "six trillion, six hundred seventy-five billion, four hundred eighty-seven million, seven hundred seventy-one thousand, six hundred sixty-one".