26691061 has 4 divisors (see below), whose sum is σ = 26789824. Its totient is φ = 26592300.

The previous prime is 26691059. The next prime is 26691073. The reversal of 26691061 is 16019662.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16019662 = 2 ⋅8009831.

It is a cyclic number.

It is not a de Polignac number, because 26691061 - 2¹ = 26691059 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 (26691001) 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, 48975 + ... + 49516.

It is an arithmetic number, because the mean of its divisors is an integer number (6697456).

Almost surely, 2^26691061 is an apocalyptic number.

It is an amenable number.

26691061 is a deficient number, since it is larger than the sum of its proper divisors (98763).

26691061 is an equidigital number, since it uses as much as digits as its factorization.

26691061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98762.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 26691061 is about 5166.3392261833. The cubic root of 26691061 is about 298.8513894063.

The spelling of 26691061 in words is "twenty-six million, six hundred ninety-one thousand, sixty-one".