1669894064 has 40 divisors (see below), whose sum is σ = 3372538608. Its totient is φ = 800236800.

The previous prime is 1669894063. The next prime is 1669894117. The reversal of 1669894064 is 4604989661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1669893997 and 1669894015.

It is not an unprimeable number, because it can be changed into a prime (1669894063) 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, 18614 + ... + 60714.

Almost surely, 2^1669894064 is an apocalyptic number.

It is an amenable number.

1669894064 is an abundant number, since it is smaller than the sum of its proper divisors (1702644544).

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

1669894064 is a wasteful number, since it uses less digits than its factorization.

1669894064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42213 (or 42207 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 53.

The square root of 1669894064 is about 40864.3373126251. The cubic root of 1669894064 is about 1186.3959085727.

The spelling of 1669894064 in words is "one billion, six hundred sixty-nine million, eight hundred ninety-four thousand, sixty-four".