26600666220 has 48 divisors (see below), whose sum is σ = 82757629920. Its totient is φ = 7093510848.

The previous prime is 26600666219. The next prime is 26600666227. The reversal of 26600666220 is 2266600662.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (26600666227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24629707 + ... + 24630786.

It is an arithmetic number, because the mean of its divisors is an integer number (1724117290).

Almost surely, 2^26600666220 is an apocalyptic number.

26600666220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26600666220 is an abundant number, since it is smaller than the sum of its proper divisors (56156963700).

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

26600666220 is a wasteful number, since it uses less digits than its factorization.

26600666220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49260511 (or 49260503 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 26600666220 in words is "twenty-six billion, six hundred million, six hundred sixty-six thousand, two hundred twenty".