1669040479 has 2 divisors, whose sum is σ = 1669040480. Its totient is φ = 1669040478.

The previous prime is 1669040473. The next prime is 1669040489. The reversal of 1669040479 is 9740409661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1669040479 - 2⁵ = 1669040447 is a prime.

It is a super-2 number, since 2×1669040479² = 5571392241081098882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1669040473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834520239 + 834520240.

It is an arithmetic number, because the mean of its divisors is an integer number (834520240).

Almost surely, 2^1669040479 is an apocalyptic number.

1669040479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669040479 is an equidigital number, since it uses as much as digits as its factorization.

1669040479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 1669040479 is about 40853.8918464325. The cubic root of 1669040479 is about 1186.1937276137.

The spelling of 1669040479 in words is "one billion, six hundred sixty-nine million, forty thousand, four hundred seventy-nine".