1606253566 has 16 divisors (see below), whose sum is σ = 2493494640. Its totient is φ = 775111680.

The previous prime is 1606253557. The next prime is 1606253569. The reversal of 1606253566 is 6653526061.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606253569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196501 + ... + 204511.

It is an arithmetic number, because the mean of its divisors is an integer number (155843415).

Almost surely, 2^1606253566 is an apocalyptic number.

1606253566 is a deficient number, since it is larger than the sum of its proper divisors (887241074).

1606253566 is a wasteful number, since it uses less digits than its factorization.

1606253566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11499.

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 1606253566 is about 40078.0933428725. The cubic root of 1606253566 is about 1171.1289091707.

The spelling of 1606253566 in words is "one billion, six hundred six million, two hundred fifty-three thousand, five hundred sixty-six".