6427877081 has 2 divisors, whose sum is σ = 6427877082. Its totient is φ = 6427877080.

The previous prime is 6427877069. The next prime is 6427877101. The reversal of 6427877081 is 1807787246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6181104400 + 246772681 = 78620^2 + 15709^2 .

It is a cyclic number.

It is not a de Polignac number, because 6427877081 - 2¹⁴ = 6427860697 is a prime.

It is a super-2 number, since 2×6427877081² = 82635207536890161122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6427877681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3213938540 + 3213938541.

It is an arithmetic number, because the mean of its divisors is an integer number (3213938541).

Almost surely, 2^6427877081 is an apocalyptic number.

It is an amenable number.

6427877081 is a deficient number, since it is larger than the sum of its proper divisors (1).

6427877081 is an equidigital number, since it uses as much as digits as its factorization.

6427877081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1053696, while the sum is 50.

The square root of 6427877081 is about 80174.0424389341. The cubic root of 6427877081 is about 1859.3273361549.

The spelling of 6427877081 in words is "six billion, four hundred twenty-seven million, eight hundred seventy-seven thousand, eighty-one".