1669049843406 has 32 divisors (see below), whose sum is σ = 3730381917696. Its totient is φ = 493436760000.

The previous prime is 1669049843311. The next prime is 1669049843411. The reversal of 1669049843406 is 6043489409661.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1669049843406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308395270 + ... + 308400681.

It is an arithmetic number, because the mean of its divisors is an integer number (116574434928).

Almost surely, 2^{1669049843406} is an apocalyptic number.

1669049843406 is an abundant number, since it is smaller than the sum of its proper divisors (2061332074290).

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

1669049843406 is a wasteful number, since it uses less digits than its factorization.

1669049843406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616796008.

The product of its (nonzero) digits is 26873856, while the sum is 60.

The spelling of 1669049843406 in words is "one trillion, six hundred sixty-nine billion, forty-nine million, eight hundred forty-three thousand, four hundred six".