6620028977 has 2 divisors, whose sum is σ = 6620028978. Its totient is φ = 6620028976.

The previous prime is 6620028967. The next prime is 6620029033. The reversal of 6620028977 is 7798200266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4868690176 + 1751338801 = 69776^2 + 41849^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6620028977 is a prime.

It is not a weakly prime, because it can be changed into another prime (6620028907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310014488 + 3310014489.

It is an arithmetic number, because the mean of its divisors is an integer number (3310014489).

Almost surely, 2^6620028977 is an apocalyptic number.

It is an amenable number.

6620028977 is a deficient number, since it is larger than the sum of its proper divisors (1).

6620028977 is an equidigital number, since it uses as much as digits as its factorization.

6620028977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 6620028977 is about 81363.5604985426. The cubic root of 6620028977 is about 1877.6730090575.

The spelling of 6620028977 in words is "six billion, six hundred twenty million, twenty-eight thousand, nine hundred seventy-seven".