1668880137 has 8 divisors (see below), whose sum is σ = 2228636704. Its totient is φ = 1110855168.

The previous prime is 1668880121. The next prime is 1668880141. The reversal of 1668880137 is 7310888661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1668880137 - 2⁴ = 1668880121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668840137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430648 + ... + 434505.

It is an arithmetic number, because the mean of its divisors is an integer number (278579588).

Almost surely, 2^1668880137 is an apocalyptic number.

It is an amenable number.

1668880137 is a deficient number, since it is larger than the sum of its proper divisors (559756567).

1668880137 is an equidigital number, since it uses as much as digits as its factorization.

1668880137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865799.

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 1668880137 is about 40851.9294158795. The cubic root of 1668880137 is about 1186.1557411642.

The spelling of 1668880137 in words is "one billion, six hundred sixty-eight million, eight hundred eighty thousand, one hundred thirty-seven".