6489377677 has 2 divisors, whose sum is σ = 6489377678. Its totient is φ = 6489377676.

The previous prime is 6489377651. The next prime is 6489377707. The reversal of 6489377677 is 7767739846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4229421156 + 2259956521 = 65034^2 + 47539^2 .

It is a cyclic number.

It is not a de Polignac number, because 6489377677 - 2¹⁵ = 6489344909 is a prime.

It is a super-2 number, since 2×6489377677² = 84224045269491832658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6489377627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3244688838 + 3244688839.

It is an arithmetic number, because the mean of its divisors is an integer number (3244688839).

Almost surely, 2^6489377677 is an apocalyptic number.

It is an amenable number.

6489377677 is a deficient number, since it is larger than the sum of its proper divisors (1).

6489377677 is an equidigital number, since it uses as much as digits as its factorization.

6489377677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74680704, while the sum is 64.

The square root of 6489377677 is about 80556.6736962246. The cubic root of 6489377677 is about 1865.2384102974.

The spelling of 6489377677 in words is "six billion, four hundred eighty-nine million, three hundred seventy-seven thousand, six hundred seventy-seven".