1669683672 has 128 divisors (see below), whose sum is σ = 5001696000. Its totient is φ = 514356480.

The previous prime is 1669683661. The next prime is 1669683677. The reversal of 1669683672 is 2763869661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669683677) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 163303 + ... + 173225.

It is an arithmetic number, because the mean of its divisors is an integer number (39075750).

Almost surely, 2^1669683672 is an apocalyptic number.

1669683672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1669683672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2500848000).

1669683672 is an abundant number, since it is smaller than the sum of its proper divisors (3332012328).

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

1669683672 is a wasteful number, since it uses less digits than its factorization.

1669683672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9998 (or 9988 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 1669683672 is about 40861.7629575622. The cubic root of 1669683672 is about 1186.3460813218.

The spelling of 1669683672 in words is "one billion, six hundred sixty-nine million, six hundred eighty-three thousand, six hundred seventy-two".