6620160997 has 2 divisors, whose sum is σ = 6620160998. Its totient is φ = 6620160996.

The previous prime is 6620160931. The next prime is 6620161007. The reversal of 6620160997 is 7990610266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4653149796 + 1967011201 = 68214^2 + 44351^2 .

It is a cyclic number.

It is not a de Polignac number, because 6620160997 - 2¹¹ = 6620158949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6620160907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310080498 + 3310080499.

It is an arithmetic number, because the mean of its divisors is an integer number (3310080499).

Almost surely, 2^6620160997 is an apocalyptic number.

It is an amenable number.

6620160997 is a deficient number, since it is larger than the sum of its proper divisors (1).

6620160997 is an equidigital number, since it uses as much as digits as its factorization.

6620160997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 6620160997 is about 81364.3717913437. The cubic root of 6620160997 is about 1877.6854908127.

The spelling of 6620160997 in words is "six billion, six hundred twenty million, one hundred sixty thousand, nine hundred ninety-seven".