1669816836 has 48 divisors (see below), whose sum is σ = 4517385600. Its totient is φ = 532404576.

The previous prime is 1669816831. The next prime is 1669816847. The reversal of 1669816836 is 6386189661.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1669816831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333631 + ... + 338598.

It is an arithmetic number, because the mean of its divisors is an integer number (94112200).

Almost surely, 2^1669816836 is an apocalyptic number.

It is an amenable number.

1669816836 is an abundant number, since it is smaller than the sum of its proper divisors (2847568764).

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

1669816836 is a wasteful number, since it uses less digits than its factorization.

1669816836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672265 (or 672257 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 1669816836 is about 40863.3923701887. The cubic root of 1669816836 is about 1186.3776191100.

The spelling of 1669816836 in words is "one billion, six hundred sixty-nine million, eight hundred sixteen thousand, eight hundred thirty-six".