26661115121 has 8 divisors (see below), whose sum is σ = 27104140224. Its totient is φ = 26218282320.

The previous prime is 26661115057. The next prime is 26661115133. The reversal of 26661115121 is 12151116662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26661115121 - 2⁶ = 26661115057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26661111121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246356 + ... + 337658.

It is an arithmetic number, because the mean of its divisors is an integer number (3388017528).

Almost surely, 2^26661115121 is an apocalyptic number.

It is an amenable number.

26661115121 is a deficient number, since it is larger than the sum of its proper divisors (443025103).

26661115121 is an equidigital number, since it uses as much as digits as its factorization.

26661115121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96151.

The product of its digits is 4320, while the sum is 32.

The spelling of 26661115121 in words is "twenty-six billion, six hundred sixty-one million, one hundred fifteen thousand, one hundred twenty-one".