1669881403 has 4 divisors (see below), whose sum is σ = 1675782328. Its totient is φ = 1663980480.

The previous prime is 1669881383. The next prime is 1669881407. The reversal of 1669881403 is 3041889661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3041889661 = 3089 ⋅984749.

It is a cyclic number.

It is not a de Polignac number, because 1669881403 - 2²⁹ = 1133010491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1669881407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2950038 + ... + 2950603.

It is an arithmetic number, because the mean of its divisors is an integer number (418945582).

Almost surely, 2^1669881403 is an apocalyptic number.

1669881403 is a deficient number, since it is larger than the sum of its proper divisors (5900925).

1669881403 is an equidigital number, since it uses as much as digits as its factorization.

1669881403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5900924.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 1669881403 is about 40864.1823973024. The cubic root of 1669881403 is about 1186.3929101796.

The spelling of 1669881403 in words is "one billion, six hundred sixty-nine million, eight hundred eighty-one thousand, four hundred three".