1666245326 has 16 divisors (see below), whose sum is σ = 2512103424. Its totient is φ = 828888984.

The previous prime is 1666245247. The next prime is 1666245349. The reversal of 1666245326 is 6235426661.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337391 + ... + 342293.

It is an arithmetic number, because the mean of its divisors is an integer number (157006464).

Almost surely, 2^1666245326 is an apocalyptic number.

1666245326 is a deficient number, since it is larger than the sum of its proper divisors (845858098).

1666245326 is a wasteful number, since it uses less digits than its factorization.

1666245326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5735.

The product of its digits is 311040, while the sum is 41.

The square root of 1666245326 is about 40819.6683719993. The cubic root of 1666245326 is about 1185.5311821565.

The spelling of 1666245326 in words is "one billion, six hundred sixty-six million, two hundred forty-five thousand, three hundred twenty-six".