1606669460 has 72 divisors (see below), whose sum is σ = 3799306728. Its totient is φ = 569958400.

The previous prime is 1606669459. The next prime is 1606669489. The reversal of 1606669460 is 649666061.

It can be written as a sum of positive squares in 4 ways, for example, as 209554576 + 1397114884 = 14476^2 + 37378^2 .

It is a Harshad number since it is a multiple of its sum of digits (44).

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 23 ways as a sum of consecutive naturals, for example, 91124 + ... + 107316.

It is an arithmetic number, because the mean of its divisors is an integer number (52768149).

Almost surely, 2^1606669460 is an apocalyptic number.

1606669460 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 practical number, because each smaller number is the sum of distinct divisors of 1606669460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1899653364).

1606669460 is an abundant number, since it is smaller than the sum of its proper divisors (2192637268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1606669460 is a wasteful number, since it uses less digits than its factorization.

1606669460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16265 (or 16252 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 1606669460 is about 40083.2815522881. The cubic root of 1606669460 is about 1171.2299773676.

The spelling of 1606669460 in words is "one billion, six hundred six million, six hundred sixty-nine thousand, four hundred sixty".