1669977882 has 72 divisors (see below), whose sum is σ = 3819515700. Its totient is φ = 527243904.

The previous prime is 1669977839. The next prime is 1669977917. The reversal of 1669977882 is 2887799661.

It can be written as a sum of positive squares in 2 ways, for example, as 1393454241 + 276523641 = 37329^2 + 16629^2 .

It is a super-2 number, since 2×1669977882² = 5577652252738411848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1037094 + ... + 1038702.

Almost surely, 2^1669977882 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1669977882, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1909757850).

1669977882 is an abundant number, since it is smaller than the sum of its proper divisors (2149537818).

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

1669977882 is a wasteful number, since it uses less digits than its factorization.

1669977882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1772 (or 1746 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 63.

The square root of 1669977882 is about 40865.3628639218. The cubic root of 1669977882 is about 1186.4157580691.

The spelling of 1669977882 in words is "one billion, six hundred sixty-nine million, nine hundred seventy-seven thousand, eight hundred eighty-two".