5661960197 has 2 divisors, whose sum is σ = 5661960198. Its totient is φ = 5661960196.

The previous prime is 5661960191. The next prime is 5661960221. The reversal of 5661960197 is 7910691665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5421524161 + 240436036 = 73631^2 + 15506^2 .

It is a cyclic number.

It is not a de Polignac number, because 5661960197 - 2⁴ = 5661960181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5661960191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2830980098 + 2830980099.

It is an arithmetic number, because the mean of its divisors is an integer number (2830980099).

Almost surely, 2^5661960197 is an apocalyptic number.

It is an amenable number.

5661960197 is a deficient number, since it is larger than the sum of its proper divisors (1).

5661960197 is an equidigital number, since it uses as much as digits as its factorization.

5661960197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 5661960197 is about 75245.9978802860. The cubic root of 5661960197 is about 1782.3333659628. Note that the first 4 decimals are identical.

The spelling of 5661960197 in words is "five billion, six hundred sixty-one million, nine hundred sixty thousand, one hundred ninety-seven".