26669866989856 has 12 divisors (see below), whose sum is σ = 52506300636342. Its totient is φ = 13334933494912.

The previous prime is 26669866989839. The next prime is 26669866989863. The reversal of 26669866989856 is 65898966896662.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19373061402256 + 7296805587600 = 4401484^2 + 2701260^2 .

It is a super-2 number, since 2×26669866989856² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 416716671685 + ... + 416716671748.

Almost surely, 2^{26669866989856} is an apocalyptic number.

It is an amenable number.

26669866989856 is a deficient number, since it is larger than the sum of its proper divisors (25836433646486).

26669866989856 is an equidigital number, since it uses as much as digits as its factorization.

26669866989856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833433343443 (or 833433343435 counting only the distinct ones).

The product of its digits is 174142586880, while the sum is 94.

The spelling of 26669866989856 in words is "twenty-six trillion, six hundred sixty-nine billion, eight hundred sixty-six million, nine hundred eighty-nine thousand, eight hundred fifty-six".