1669157484 has 12 divisors (see below), whose sum is σ = 3894700824. Its totient is φ = 556385824.

The previous prime is 1669157443. The next prime is 1669157491. The reversal of 1669157484 is 4847519661.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69548217 + ... + 69548240.

It is an arithmetic number, because the mean of its divisors is an integer number (324558402).

Almost surely, 2^1669157484 is an apocalyptic number.

It is an amenable number.

1669157484 is an abundant number, since it is smaller than the sum of its proper divisors (2225543340).

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

1669157484 is a wasteful number, since it uses less digits than its factorization.

1669157484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139096464 (or 139096462 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 51.

The square root of 1669157484 is about 40855.3238146511. The cubic root of 1669157484 is about 1186.2214456061.

The spelling of 1669157484 in words is "one billion, six hundred sixty-nine million, one hundred fifty-seven thousand, four hundred eighty-four".