26646644 has 6 divisors (see below), whose sum is σ = 46631634. Its totient is φ = 13323320.

The previous prime is 26646611. The next prime is 26646661. The reversal of 26646644 is 44664662.

It can be written as a sum of positive squares in only one way, i.e., 26646244 + 400 = 5162^2 + 20^2 .

It is a junction number, because it is equal to n+sod(n) for n = 26646598 and 26646607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330827 + ... + 3330834.

It is an arithmetic number, because the mean of its divisors is an integer number (7771939).

Almost surely, 2^26646644 is an apocalyptic number.

It is an amenable number.

26646644 is a deficient number, since it is larger than the sum of its proper divisors (19984990).

26646644 is a wasteful number, since it uses less digits than its factorization.

26646644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6661665 (or 6661663 counting only the distinct ones).

The product of its digits is 165888, while the sum is 38.

The square root of 26646644 is about 5162.0387445272. The cubic root of 26646644 is about 298.6855229866.

The spelling of 26646644 in words is "twenty-six million, six hundred forty-six thousand, six hundred forty-four".