1668733097 has 4 divisors (see below), whose sum is σ = 1668829380. Its totient is φ = 1668636816.

The previous prime is 1668733067. The next prime is 1668733103. The reversal of 1668733097 is 7903378661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1345128976 + 323604121 = 36676^2 + 17989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1668733097 - 2¹⁸ = 1668470953 is a prime.

It is a super-2 number, since 2×1668733097² = 5569340298046422818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668733057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14138 + ... + 59475.

It is an arithmetic number, because the mean of its divisors is an integer number (417207345).

Almost surely, 2^1668733097 is an apocalyptic number.

It is an amenable number.

1668733097 is a deficient number, since it is larger than the sum of its proper divisors (96283).

1668733097 is an equidigital number, since it uses as much as digits as its factorization.

1668733097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96282.

The product of its (nonzero) digits is 1143072, while the sum is 50.

The square root of 1668733097 is about 40850.1297060364. The cubic root of 1668733097 is about 1186.1209039384.

The spelling of 1668733097 in words is "one billion, six hundred sixty-eight million, seven hundred thirty-three thousand, ninety-seven".