1668502079 has 2 divisors, whose sum is σ = 1668502080. Its totient is φ = 1668502078.

The previous prime is 1668502027. The next prime is 1668502097. The reversal of 1668502079 is 9702058661.

Together with next prime (1668502097) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1668502079 - 2¹² = 1668497983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1668505079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834251039 + 834251040.

It is an arithmetic number, because the mean of its divisors is an integer number (834251040).

Almost surely, 2^1668502079 is an apocalyptic number.

1668502079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668502079 is an equidigital number, since it uses as much as digits as its factorization.

1668502079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 1668502079 is about 40847.3019794453. The cubic root of 1668502079 is about 1186.0661662204.

The spelling of 1668502079 in words is "one billion, six hundred sixty-eight million, five hundred two thousand, seventy-nine".