1660206445 has 8 divisors (see below), whose sum is σ = 2014633080. Its totient is φ = 1313241600.

The previous prime is 1660206407. The next prime is 1660206461. The reversal of 1660206445 is 5446020661.

It can be written as a sum of positive squares in 4 ways, for example, as 61246276 + 1598960169 = 7826^2 + 39987^2 .

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

It is not a de Polignac number, because 1660206445 - 2⁹ = 1660205933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1660206445.

It is a congruent number.

It is an unprimeable number.

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, 1864956 + ... + 1865845.

It is an arithmetic number, because the mean of its divisors is an integer number (251829135).

Almost surely, 2^1660206445 is an apocalyptic number.

It is an amenable number.

1660206445 is a deficient number, since it is larger than the sum of its proper divisors (354426635).

1660206445 is an equidigital number, since it uses as much as digits as its factorization.

1660206445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3730895.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 1660206445 is about 40745.6309927825. The cubic root of 1660206445 is about 1184.0972300102.

The spelling of 1660206445 in words is "one billion, six hundred sixty million, two hundred six thousand, four hundred forty-five".