6820016779 has 2 divisors, whose sum is σ = 6820016780. Its totient is φ = 6820016778.

The previous prime is 6820016737. The next prime is 6820016813. The reversal of 6820016779 is 9776100286.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6820016779 - 2²⁷ = 6685799051 is a prime.

It is not a weakly prime, because it can be changed into another prime (6820016279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3410008389 + 3410008390.

It is an arithmetic number, because the mean of its divisors is an integer number (3410008390).

Almost surely, 2^6820016779 is an apocalyptic number.

6820016779 is a deficient number, since it is larger than the sum of its proper divisors (1).

6820016779 is an equidigital number, since it uses as much as digits as its factorization.

6820016779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 6820016779 is about 82583.3928765342. The cubic root of 6820016779 is about 1896.3936002795.

The spelling of 6820016779 in words is "six billion, eight hundred twenty million, sixteen thousand, seven hundred seventy-nine".