1669878413 has 8 divisors (see below), whose sum is σ = 1960012032. Its totient is φ = 1392639696.

The previous prime is 1669878401. The next prime is 1669878433. The reversal of 1669878413 is 3148789661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1669878413 - 2¹⁸ = 1669616269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669878433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3223445 + ... + 3223962.

It is an arithmetic number, because the mean of its divisors is an integer number (245001504).

Almost surely, 2^1669878413 is an apocalyptic number.

It is an amenable number.

1669878413 is a deficient number, since it is larger than the sum of its proper divisors (290133619).

1669878413 is an equidigital number, since it uses as much as digits as its factorization.

1669878413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6447451.

The product of its digits is 1741824, while the sum is 53.

The square root of 1669878413 is about 40864.1458126803. The cubic root of 1669878413 is about 1186.3922020820.

The spelling of 1669878413 in words is "one billion, six hundred sixty-nine million, eight hundred seventy-eight thousand, four hundred thirteen".