1668425266 has 8 divisors (see below), whose sum is σ = 2549857644. Its totient is φ = 818472720.

The previous prime is 1668425243. The next prime is 1668425273. The reversal of 1668425266 is 6625248661.

It can be written as a sum of positive squares in 2 ways, for example, as 1492199641 + 176225625 = 38629^2 + 13275^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7869825 + ... + 7870036.

Almost surely, 2^1668425266 is an apocalyptic number.

1668425266 is a deficient number, since it is larger than the sum of its proper divisors (881432378).

1668425266 is a wasteful number, since it uses less digits than its factorization.

1668425266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15739916.

The product of its digits is 829440, while the sum is 46.

The square root of 1668425266 is about 40846.3617229246. The cubic root of 1668425266 is about 1186.0479649248.

The spelling of 1668425266 in words is "one billion, six hundred sixty-eight million, four hundred twenty-five thousand, two hundred sixty-six".