1669168215 has 144 divisors (see below), whose sum is σ = 3549087360. Its totient is φ = 746029440.

The previous prime is 1669168187. The next prime is 1669168217. The reversal of 1669168215 is 5128619661.

It is not a de Polignac number, because 1669168215 - 2¹¹ = 1669166167 is a prime.

It is a super-2 number, since 2×1669168215² = 5572245059932572450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669168217) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2258316 + ... + 2259054.

It is an arithmetic number, because the mean of its divisors is an integer number (24646440).

Almost surely, 2^1669168215 is an apocalyptic number.

1669168215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1669168215 is an abundant number, since it is smaller than the sum of its proper divisors (1879919145).

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

1669168215 is a wasteful number, since it uses less digits than its factorization.

1669168215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 771 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 1669168215 is about 40855.4551437137. The cubic root of 1669168215 is about 1186.2239876700.

The spelling of 1669168215 in words is "one billion, six hundred sixty-nine million, one hundred sixty-eight thousand, two hundred fifteen".