26540600066 has 4 divisors (see below), whose sum is σ = 39810900102. Its totient is φ = 13270300032.

The previous prime is 26540600063. The next prime is 26540600101. The reversal of 26540600066 is 66000604562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66000604562 = 2 ⋅33000302281.

It can be written as a sum of positive squares in only one way, i.e., 14924287225 + 11616312841 = 122165^2 + 107779^2 .

It is a junction number, because it is equal to n+sod(n) for n = 26540599999 and 26540600035.

It is not an unprimeable number, because it can be changed into a prime (26540600063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6635150015 + ... + 6635150018.

Almost surely, 2^26540600066 is an apocalyptic number.

26540600066 is a deficient number, since it is larger than the sum of its proper divisors (13270300036).

26540600066 is a wasteful number, since it uses less digits than its factorization.

26540600066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13270300035.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 26540600066 in words is "twenty-six billion, five hundred forty million, six hundred thousand, sixty-six".