26656660 has 12 divisors (see below), whose sum is σ = 55979028. Its totient is φ = 10662656.

The previous prime is 26656649. The next prime is 26656673. The reversal of 26656660 is 6665662.

It can be written as a sum of positive squares in 2 ways, for example, as 4866436 + 21790224 = 2206^2 + 4668^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666397 + ... + 666436.

It is an arithmetic number, because the mean of its divisors is an integer number (4664919).

Almost surely, 2^26656660 is an apocalyptic number.

26656660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26656660 is an abundant number, since it is smaller than the sum of its proper divisors (29322368).

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

26656660 is a wasteful number, since it uses less digits than its factorization.

26656660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332842 (or 1332840 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 26656660 is about 5163.0088126983. The cubic root of 26656660 is about 298.7229418256.

The spelling of 26656660 in words is "twenty-six million, six hundred fifty-six thousand, six hundred sixty".