1669968456 has 32 divisors (see below), whose sum is σ = 4496069760. Its totient is φ = 513836352.

The previous prime is 1669968449. The next prime is 1669968457. The reversal of 1669968456 is 6548699661.

It is a self number, because there is not a number n which added to its sum of digits gives 1669968456.

It is not an unprimeable number, because it can be changed into a prime (1669968457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2675920 + ... + 2676543.

It is an arithmetic number, because the mean of its divisors is an integer number (140502180).

Almost surely, 2^1669968456 is an apocalyptic number.

It is an amenable number.

1669968456 is an abundant number, since it is smaller than the sum of its proper divisors (2826101304).

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

1669968456 is a wasteful number, since it uses less digits than its factorization.

1669968456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5352485 (or 5352481 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 60.

The square root of 1669968456 is about 40865.2475338153. The cubic root of 1669968456 is about 1186.4135258687.

The spelling of 1669968456 in words is "one billion, six hundred sixty-nine million, nine hundred sixty-eight thousand, four hundred fifty-six".