660161651 has 2 divisors, whose sum is σ = 660161652. Its totient is φ = 660161650.

The previous prime is 660161633. The next prime is 660161687. The reversal of 660161651 is 156161066.

660161651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 660161651 - 2¹⁴ = 660145267 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (660161611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330080825 + 330080826.

It is an arithmetic number, because the mean of its divisors is an integer number (330080826).

Almost surely, 2^660161651 is an apocalyptic number.

660161651 is a deficient number, since it is larger than the sum of its proper divisors (1).

660161651 is an equidigital number, since it uses as much as digits as its factorization.

660161651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 660161651 is about 25693.6110930324. The cubic root of 660161651 is about 870.7298455677.

The spelling of 660161651 in words is "six hundred sixty million, one hundred sixty-one thousand, six hundred fifty-one".