1669945824 has 72 divisors (see below), whose sum is σ = 4752860112. Its totient is φ = 556185600.

The previous prime is 1669945801. The next prime is 1669945829. The reversal of 1669945824 is 4285499661.

1669945824 is a `hidden beast` number, since 166 + 9 + 9 + 458 + 24 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669945829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 653349 + ... + 655899.

It is an arithmetic number, because the mean of its divisors is an integer number (66011946).

Almost surely, 2^1669945824 is an apocalyptic number.

It is an amenable number.

1669945824 is an abundant number, since it is smaller than the sum of its proper divisors (3082914288).

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

1669945824 is a wasteful number, since it uses less digits than its factorization.

1669945824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4840 (or 4829 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 1669945824 is about 40864.9706227718. The cubic root of 1669945824 is about 1186.4081662800.

The spelling of 1669945824 in words is "one billion, six hundred sixty-nine million, nine hundred forty-five thousand, eight hundred twenty-four".