1669957380 has 288 divisors, whose sum is σ = 6274195200. Its totient is φ = 350106624.

The previous prime is 1669957363. The next prime is 1669957391. The reversal of 1669957380 is 837599661.

1669957380 is a `hidden beast` number, since 1 + 6 + 69 + 9 + 573 + 8 + 0 = 666.

1669957380 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4406031 + ... + 4406409.

It is an arithmetic number, because the mean of its divisors is an integer number (21785400).

Almost surely, 2^1669957380 is an apocalyptic number.

1669957380 is a gapful number since it is divisible by the number (10) 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 1669957380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3137097600).

1669957380 is an abundant number, since it is smaller than the sum of its proper divisors (4604237820).

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

1669957380 is a wasteful number, since it uses less digits than its factorization.

1669957380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The square root of 1669957380 is about 40865.1120150184. The cubic root of 1669957380 is about 1186.4109029159.

The spelling of 1669957380 in words is "one billion, six hundred sixty-nine million, nine hundred fifty-seven thousand, three hundred eighty".