1669551066 has 36 divisors (see below), whose sum is σ = 3737852586. Its totient is φ = 538559280.

The previous prime is 1669551053. The next prime is 1669551127. The reversal of 1669551066 is 6601559661.

1669551066 is a `hidden beast` number, since 16 + 69 + 5 + 510 + 66 = 666.

1669551066 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1404675441 + 264875625 = 37479^2 + 16275^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 30961 + ... + 65556.

Almost surely, 2^1669551066 is an apocalyptic number.

1669551066 is an abundant number, since it is smaller than the sum of its proper divisors (2068301520).

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

1669551066 is a wasteful number, since it uses less digits than its factorization.

1669551066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96587 (or 96553 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 1669551066 is about 40860.1403081291. The cubic root of 1669551066 is about 1186.3146740207.

The spelling of 1669551066 in words is "one billion, six hundred sixty-nine million, five hundred fifty-one thousand, sixty-six".