1606166644 has 12 divisors (see below), whose sum is σ = 2811839968. Its totient is φ = 802783800.

The previous prime is 1606166623. The next prime is 1606166663. The reversal of 1606166644 is 4466616061.

It is a junction number, because it is equal to n+sod(n) for n = 1606166597 and 1606166606.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 62592 + ... + 84439.

Almost surely, 2^1606166644 is an apocalyptic number.

It is an amenable number.

1606166644 is a deficient number, since it is larger than the sum of its proper divisors (1205673324).

1606166644 is a wasteful number, since it uses less digits than its factorization.

1606166644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149766 (or 149764 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 1606166644 is about 40077.0089203274. The cubic root of 1606166644 is about 1171.1077836760.

The spelling of 1606166644 in words is "one billion, six hundred six million, one hundred sixty-six thousand, six hundred forty-four".