160651660721 has 2 divisors, whose sum is σ = 160651660722. Its totient is φ = 160651660720.

The previous prime is 160651660717. The next prime is 160651660739. The reversal of 160651660721 is 127066156061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118980154225 + 41671506496 = 344935^2 + 204136^2 .

It is a cyclic number.

It is not a de Polignac number, because 160651660721 - 2² = 160651660717 is a prime.

It is not a weakly prime, because it can be changed into another prime (160651660921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80325830360 + 80325830361.

It is an arithmetic number, because the mean of its divisors is an integer number (80325830361).

Almost surely, 2^160651660721 is an apocalyptic number.

It is an amenable number.

160651660721 is a deficient number, since it is larger than the sum of its proper divisors (1).

160651660721 is an equidigital number, since it uses as much as digits as its factorization.

160651660721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 160651660721 in words is "one hundred sixty billion, six hundred fifty-one million, six hundred sixty thousand, seven hundred twenty-one".