6620703997 has 2 divisors, whose sum is σ = 6620703998. Its totient is φ = 6620703996.

The previous prime is 6620703953. The next prime is 6620704049. The reversal of 6620703997 is 7993070266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5668734681 + 951969316 = 75291^2 + 30854^2 .

It is a cyclic number.

It is not a de Polignac number, because 6620703997 - 2¹⁵ = 6620671229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6620703997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6620707997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310351998 + 3310351999.

It is an arithmetic number, because the mean of its divisors is an integer number (3310351999).

Almost surely, 2^6620703997 is an apocalyptic number.

It is an amenable number.

6620703997 is a deficient number, since it is larger than the sum of its proper divisors (1).

6620703997 is an equidigital number, since it uses as much as digits as its factorization.

6620703997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 49.

The square root of 6620703997 is about 81367.7085642701. The cubic root of 6620703997 is about 1877.7368266914.

The spelling of 6620703997 in words is "six billion, six hundred twenty million, seven hundred three thousand, nine hundred ninety-seven".