26641664 has 36 divisors (see below), whose sum is σ = 60780384. Its totient is φ = 11417088.

The previous prime is 26641663. The next prime is 26641687. The reversal of 26641664 is 46614662.

It is a super-3 number, since 3×26641664³ (a number of 23 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26641661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5642 + ... + 9225.

It is an arithmetic number, because the mean of its divisors is an integer number (1688344).

Almost surely, 2^26641664 is an apocalyptic number.

It is an amenable number.

26641664 is an abundant number, since it is smaller than the sum of its proper divisors (34138720).

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

26641664 is an equidigital number, since it uses as much as digits as its factorization.

26641664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14890 (or 14876 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

The square root of 26641664 is about 5161.5563544342. The cubic root of 26641664 is about 298.6669146823. Note that the first 3 decimals are identical.

The spelling of 26641664 in words is "twenty-six million, six hundred forty-one thousand, six hundred sixty-four".