1606786673 has 8 divisors (see below), whose sum is σ = 1666477800. Its totient is φ = 1547381248.

The previous prime is 1606786651. The next prime is 1606786691. The reversal of 1606786673 is 3766876061.

It can be written as a sum of positive squares in 4 ways, for example, as 271030369 + 1335756304 = 16463^2 + 36548^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1606786673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1606786613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59936 + ... + 82497.

It is an arithmetic number, because the mean of its divisors is an integer number (208309725).

Almost surely, 2^1606786673 is an apocalyptic number.

It is an amenable number.

1606786673 is a deficient number, since it is larger than the sum of its proper divisors (59691127).

1606786673 is a wasteful number, since it uses less digits than its factorization.

1606786673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142851.

The product of its (nonzero) digits is 1524096, while the sum is 50.

The square root of 1606786673 is about 40084.7436439352. The cubic root of 1606786673 is about 1171.2584586544.

The spelling of 1606786673 in words is "one billion, six hundred six million, seven hundred eighty-six thousand, six hundred seventy-three".