26661407080 has 128 divisors (see below), whose sum is σ = 75168000000. Its totient is φ = 8268099840.

The previous prime is 26661407063. The next prime is 26661407081. The reversal of 26661407080 is 8070416662.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (26661407081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 591171 + ... + 634669.

It is an arithmetic number, because the mean of its divisors is an integer number (587250000).

Almost surely, 2^26661407080 is an apocalyptic number.

26661407080 is a gapful number since it is divisible by the number (20) 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 26661407080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37584000000).

26661407080 is an abundant number, since it is smaller than the sum of its proper divisors (48506592920).

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

26661407080 is a wasteful number, since it uses less digits than its factorization.

26661407080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43727 (or 43723 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 26661407080 in words is "twenty-six billion, six hundred sixty-one million, four hundred seven thousand, eighty".