It is a happy number.
It is an unprimeable number.
Almost surely, 21606750660 is an apocalyptic number.
1606750660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1606750660 is a wasteful number, since it uses less digits than its factorization.
1606750660 is an odious number, because the sum of its binary digits is odd.
The square root of 1606750660 is about 40084.2944306121. The cubic root of 1606750660 is about 1171.2497080952.
The spelling of 1606750660 in words is "one billion, six hundred six million, seven hundred fifty thousand, six hundred sixty".