26666390028 has 48 divisors (see below), whose sum is σ = 67266590720. Its totient is φ = 8193369024.

The previous prime is 26666390027. The next prime is 26666390033. The reversal of 26666390028 is 82009366662.

It is a super-2 number, since 2×26666390028² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26666390021) 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, 1572076 + ... + 1588947.

Almost surely, 2^26666390028 is an apocalyptic number.

It is an amenable number.

26666390028 is an abundant number, since it is smaller than the sum of its proper divisors (40600200692).

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

26666390028 is a wasteful number, since it uses less digits than its factorization.

26666390028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3161086 (or 3161084 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 48.

The spelling of 26666390028 in words is "twenty-six billion, six hundred sixty-six million, three hundred ninety thousand, twenty-eight".