26642666928 has 20 divisors (see below), whose sum is σ = 68826889688. Its totient is φ = 8880888960.

The previous prime is 26642666927. The next prime is 26642666987. The reversal of 26642666928 is 82966624662.

It is a super-3 number, since 3×26642666928³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (26642666927) 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, 277527733 + ... + 277527828.

Almost surely, 2^26642666928 is an apocalyptic number.

It is an amenable number.

26642666928 is an abundant number, since it is smaller than the sum of its proper divisors (42184222760).

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

26642666928 is a wasteful number, since it uses less digits than its factorization.

26642666928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555055572 (or 555055566 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 57.

The spelling of 26642666928 in words is "twenty-six billion, six hundred forty-two million, six hundred sixty-six thousand, nine hundred twenty-eight".