1669487318 has 16 divisors (see below), whose sum is σ = 2525783040. Its totient is φ = 827572200.

The previous prime is 1669487317. The next prime is 1669487321. The reversal of 1669487318 is 8137849661.

It is a self number, because there is not a number n which added to its sum of digits gives 1669487318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669487311) 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, 343163 + ... + 347993.

It is an arithmetic number, because the mean of its divisors is an integer number (157861440).

Almost surely, 2^1669487318 is an apocalyptic number.

1669487318 is a deficient number, since it is larger than the sum of its proper divisors (856295722).

1669487318 is a wasteful number, since it uses less digits than its factorization.

1669487318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6283.

The product of its digits is 1741824, while the sum is 53.

The square root of 1669487318 is about 40859.3602250451. The cubic root of 1669487318 is about 1186.2995749218.

The spelling of 1669487318 in words is "one billion, six hundred sixty-nine million, four hundred eighty-seven thousand, three hundred eighteen".