1669612808 has 16 divisors (see below), whose sum is σ = 3133363500. Its totient is φ = 834049216.

The previous prime is 1669612807. The next prime is 1669612829. The reversal of 1669612808 is 8082169661.

It can be written as a sum of positive squares in 2 ways, for example, as 1233554884 + 436057924 = 35122^2 + 20882^2 .

It is not an unprimeable number, because it can be changed into a prime (1669612801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85223 + ... + 102966.

Almost surely, 2^1669612808 is an apocalyptic number.

It is an amenable number.

1669612808 is a deficient number, since it is larger than the sum of its proper divisors (1463750692).

1669612808 is a wasteful number, since it uses less digits than its factorization.

1669612808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189304 (or 189300 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 1669612808 is about 40860.8958296315. The cubic root of 1669612808 is about 1186.3292976201.

The spelling of 1669612808 in words is "one billion, six hundred sixty-nine million, six hundred twelve thousand, eight hundred eight".