26660149 has 4 divisors (see below), whose sum is σ = 26675136. Its totient is φ = 26645164.

The previous prime is 26660147. The next prime is 26660191. The reversal of 26660149 is 94106662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26660149 - 2¹ = 26660147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26660141) 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, 4399 + ... + 8524.

It is an arithmetic number, because the mean of its divisors is an integer number (6668784).

Almost surely, 2^26660149 is an apocalyptic number.

It is an amenable number.

26660149 is a deficient number, since it is larger than the sum of its proper divisors (14987).

26660149 is a wasteful number, since it uses less digits than its factorization.

26660149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14986.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 26660149 is about 5163.3466860167. The cubic root of 26660149 is about 298.7359742019.

The spelling of 26660149 in words is "twenty-six million, six hundred sixty thousand, one hundred forty-nine".