6421082077 has 2 divisors, whose sum is σ = 6421082078. Its totient is φ = 6421082076.

The previous prime is 6421082069. The next prime is 6421082081. The reversal of 6421082077 is 7702801246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4928882436 + 1492199641 = 70206^2 + 38629^2 .

It is a cyclic number.

It is not a de Polignac number, because 6421082077 - 2³ = 6421082069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6421082047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3210541038 + 3210541039.

It is an arithmetic number, because the mean of its divisors is an integer number (3210541039).

Almost surely, 2^6421082077 is an apocalyptic number.

It is an amenable number.

6421082077 is a deficient number, since it is larger than the sum of its proper divisors (1).

6421082077 is an equidigital number, since it uses as much as digits as its factorization.

6421082077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 6421082077 is about 80131.6546503315. The cubic root of 6421082077 is about 1858.6719310056.

The spelling of 6421082077 in words is "six billion, four hundred twenty-one million, eighty-two thousand, seventy-seven".