2669778469 has 4 divisors (see below), whose sum is σ = 2669915200. Its totient is φ = 2669641740.

The previous prime is 2669778403. The next prime is 2669778491. The reversal of 2669778469 is 9648779662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9648779662 = 2 ⋅4824389831.

It is a cyclic number.

It is not a de Polignac number, because 2669778469 - 2³¹ = 522294821 is a prime.

It is a super-4 number, since 4×2669778469⁴ (a number of 39 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2669778469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2669778499) 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, 32967 + ... + 80164.

It is an arithmetic number, because the mean of its divisors is an integer number (667478800).

Almost surely, 2^2669778469 is an apocalyptic number.

It is an amenable number.

2669778469 is a deficient number, since it is larger than the sum of its proper divisors (136731).

2669778469 is a wasteful number, since it uses less digits than its factorization.

2669778469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136730.

The product of its digits is 54867456, while the sum is 64.

The square root of 2669778469 is about 51669.8990612523. The cubic root of 2669778469 is about 1387.2617398314.

The spelling of 2669778469 in words is "two billion, six hundred sixty-nine million, seven hundred seventy-eight thousand, four hundred sixty-nine".