1668000137 has 4 divisors (see below), whose sum is σ = 1668374736. Its totient is φ = 1667625540.

The previous prime is 1668000127. The next prime is 1668000179. The reversal of 1668000137 is 7310008661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1668000137 - 2⁶ = 1668000073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668000107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180539 + ... + 189552.

It is an arithmetic number, because the mean of its divisors is an integer number (417093684).

Almost surely, 2^1668000137 is an apocalyptic number.

It is an amenable number.

1668000137 is a deficient number, since it is larger than the sum of its proper divisors (374599).

1668000137 is an equidigital number, since it uses as much as digits as its factorization.

1668000137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374598.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1668000137 is about 40841.1573905540. The cubic root of 1668000137 is about 1185.9472179853.

Adding to 1668000137 its reverse (7310008661), we get a palindrome (8978008798).

The spelling of 1668000137 in words is "one billion, six hundred sixty-eight million, one hundred thirty-seven", and thus it is an aban number.