26666839969 has 16 divisors (see below), whose sum is σ = 33279068160. Its totient is φ = 20759294160.

The previous prime is 26666839963. The next prime is 26666839973. The reversal of 26666839969 is 96993866662.

It is not a de Polignac number, because 26666839969 - 2¹⁷ = 26666708897 is a prime.

It is a super-2 number, since 2×26666839969² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26666839898 and 26666839907.

It is not an unprimeable number, because it can be changed into a prime (26666839963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86659 + ... + 246664.

It is an arithmetic number, because the mean of its divisors is an integer number (2079941760).

Almost surely, 2^26666839969 is an apocalyptic number.

It is an amenable number.

26666839969 is a deficient number, since it is larger than the sum of its proper divisors (6612228191).

26666839969 is a wasteful number, since it uses less digits than its factorization.

26666839969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334380.

The product of its digits is 272097792, while the sum is 70.

The spelling of 26666839969 in words is "twenty-six billion, six hundred sixty-six million, eight hundred thirty-nine thousand, nine hundred sixty-nine".