26665061 has 4 divisors (see below), whose sum is σ = 28233612. Its totient is φ = 25096512.

The previous prime is 26665043. The next prime is 26665081. The reversal of 26665061 is 16056662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7392961 + 19272100 = 2719^2 + 4390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26665061 is a prime.

It is a super-2 number, since 2×26665061² = 1422050956267442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26665081) 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, 784250 + ... + 784283.

It is an arithmetic number, because the mean of its divisors is an integer number (7058403).

Almost surely, 2^26665061 is an apocalyptic number.

It is an amenable number.

26665061 is a deficient number, since it is larger than the sum of its proper divisors (1568551).

26665061 is a wasteful number, since it uses less digits than its factorization.

26665061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568550.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 26665061 is about 5163.8223245964. The cubic root of 26665061 is about 298.7543199483.

The spelling of 26665061 in words is "twenty-six million, six hundred sixty-five thousand, sixty-one".