26640066 has 8 divisors (see below), whose sum is σ = 53280144. Its totient is φ = 8880020.

The previous prime is 26640041. The next prime is 26640073. The reversal of 26640066 is 66004662.

It is a sphenic number, since it is the product of 3 distinct primes.

26640066 is an admirable number.

It is a Curzon 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, 2220000 + ... + 2220011.

It is an arithmetic number, because the mean of its divisors is an integer number (6660018).

Almost surely, 2^26640066 is an apocalyptic number.

26640066 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

26640066 is a wasteful number, since it uses less digits than its factorization.

26640066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4440016.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 26640066 is about 5161.4015538417. The cubic root of 26640066 is about 298.6609430925.

The spelling of 26640066 in words is "twenty-six million, six hundred forty thousand, sixty-six".