1666683353 has 8 divisors (see below), whose sum is σ = 1673469000. Its totient is φ = 1659909888.

The previous prime is 1666683341. The next prime is 1666683377. The reversal of 1666683353 is 3533866661.

It can be written as a sum of positive squares in 4 ways, for example, as 94322944 + 1572360409 = 9712^2 + 39653^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1666683353 - 2³⁰ = 592941529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1666683298 and 1666683307.

It is not an unprimeable number, because it can be changed into a prime (1666686353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349775 + ... + 354507.

It is an arithmetic number, because the mean of its divisors is an integer number (209183625).

Almost surely, 2^1666683353 is an apocalyptic number.

It is an amenable number.

1666683353 is a deficient number, since it is larger than the sum of its proper divisors (6785647).

1666683353 is a wasteful number, since it uses less digits than its factorization.

1666683353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6091.

The product of its digits is 1399680, while the sum is 47.

The square root of 1666683353 is about 40825.0334108865. The cubic root of 1666683353 is about 1185.6350582506.

The spelling of 1666683353 in words is "one billion, six hundred sixty-six million, six hundred eighty-three thousand, three hundred fifty-three".