1660663097 has 2 divisors, whose sum is σ = 1660663098. Its totient is φ = 1660663096.

The previous prime is 1660663063. The next prime is 1660663117. The reversal of 1660663097 is 7903660661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1439367721 + 221295376 = 37939^2 + 14876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1660663097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1660663007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830331548 + 830331549.

It is an arithmetic number, because the mean of its divisors is an integer number (830331549).

Almost surely, 2^1660663097 is an apocalyptic number.

It is an amenable number.

1660663097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660663097 is an equidigital number, since it uses as much as digits as its factorization.

1660663097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 1660663097 is about 40751.2343003252. The cubic root of 1660663097 is about 1184.2057849435.

The spelling of 1660663097 in words is "one billion, six hundred sixty million, six hundred sixty-three thousand, ninety-seven".