1606661303 has 4 divisors (see below), whose sum is σ = 1730250648. Its totient is φ = 1483071960.

The previous prime is 1606661293. The next prime is 1606661311. The reversal of 1606661303 is 3031666061.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1606661303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1606661303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606861303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61794653 + ... + 61794678.

It is an arithmetic number, because the mean of its divisors is an integer number (432562662).

Almost surely, 2^1606661303 is an apocalyptic number.

1606661303 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1606661303 is a deficient number, since it is larger than the sum of its proper divisors (123589345).

1606661303 is a wasteful number, since it uses less digits than its factorization.

1606661303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123589344.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 1606661303 is about 40083.1798015078. The cubic root of 1606661303 is about 1171.2279952675.

The spelling of 1606661303 in words is "one billion, six hundred six million, six hundred sixty-one thousand, three hundred three".