6547023661 has 2 divisors, whose sum is σ = 6547023662. Its totient is φ = 6547023660.

The previous prime is 6547023647. The next prime is 6547023739. The reversal of 6547023661 is 1663207456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3927528900 + 2619494761 = 62670^2 + 51181^2 .

It is a cyclic number.

It is not a de Polignac number, because 6547023661 - 2⁷ = 6547023533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6547023611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3273511830 + 3273511831.

It is an arithmetic number, because the mean of its divisors is an integer number (3273511831).

Almost surely, 2^6547023661 is an apocalyptic number.

It is an amenable number.

6547023661 is a deficient number, since it is larger than the sum of its proper divisors (1).

6547023661 is an equidigital number, since it uses as much as digits as its factorization.

6547023661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 6547023661 is about 80913.6803080913. The cubic root of 6547023661 is about 1870.7451881498.

The spelling of 6547023661 in words is "six billion, five hundred forty-seven million, twenty-three thousand, six hundred sixty-one".