1669564668 has 24 divisors (see below), whose sum is σ = 3921800400. Its totient is φ = 552785920.

The previous prime is 1669564661. The next prime is 1669564669. The reversal of 1669564668 is 8664659661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669564661) 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, 465093 + ... + 468668.

It is an arithmetic number, because the mean of its divisors is an integer number (163408350).

Almost surely, 2^1669564668 is an apocalyptic number.

It is an amenable number.

1669564668 is an abundant number, since it is smaller than the sum of its proper divisors (2252235732).

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

1669564668 is a wasteful number, since it uses less digits than its factorization.

1669564668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933917 (or 933915 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 57.

The square root of 1669564668 is about 40860.3067536209. The cubic root of 1669564668 is about 1186.3178956869.

The spelling of 1669564668 in words is "one billion, six hundred sixty-nine million, five hundred sixty-four thousand, six hundred sixty-eight".