66266115 has 24 divisors (see below), whose sum is σ = 107627760. Its totient is φ = 34815744.

The previous prime is 66266071. The next prime is 66266117. The reversal of 66266115 is 51166266.

It is not a de Polignac number, because 66266115 - 2¹⁰ = 66265091 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66266117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79521 + ... + 80349.

It is an arithmetic number, because the mean of its divisors is an integer number (4484490).

Almost surely, 2^66266115 is an apocalyptic number.

66266115 is a deficient number, since it is larger than the sum of its proper divisors (41361645).

66266115 is an equidigital number, since it uses as much as digits as its factorization.

66266115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983 (or 910 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 66266115 is about 8140.4001744386. The cubic root of 66266115 is about 404.6664224747. Note that the first 3 decimals are identical.

The spelling of 66266115 in words is "sixty-six million, two hundred sixty-six thousand, one hundred fifteen".