26667780984 has 160 divisors (see below), whose sum is σ = 80592185520. Its totient is φ = 8189973504.

The previous prime is 26667780967. The next prime is 26667780991. The reversal of 26667780984 is 48908776662.

It is a super-2 number, since 2×26667780984² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4942192 + ... + 4947584.

Almost surely, 2^26667780984 is an apocalyptic number.

26667780984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26667780984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40296092760).

26667780984 is an abundant number, since it is smaller than the sum of its proper divisors (53924404536).

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

26667780984 is a wasteful number, since it uses less digits than its factorization.

26667780984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6011 (or 5998 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 63.

The spelling of 26667780984 in words is "twenty-six billion, six hundred sixty-seven million, seven hundred eighty thousand, nine hundred eighty-four".