66612266 has 24 divisors (see below), whose sum is σ = 116933220. Its totient is φ = 28375872.

The previous prime is 66612253. The next prime is 66612313. The reversal of 66612266 is 66221666.

It can be written as a sum of positive squares in 2 ways, for example, as 66504025 + 108241 = 8155^2 + 329^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14990 + ... + 18918.

Almost surely, 2^66612266 is an apocalyptic number.

66612266 is a deficient number, since it is larger than the sum of its proper divisors (50320954).

66612266 is a wasteful number, since it uses less digits than its factorization.

66612266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4118 (or 4111 counting only the distinct ones).

The product of its digits is 31104, while the sum is 35.

The square root of 66612266 is about 8161.6337825217. The cubic root of 66612266 is about 405.3698110771.

The spelling of 66612266 in words is "sixty-six million, six hundred twelve thousand, two hundred sixty-six".