66166226 has 16 divisors (see below), whose sum is σ = 117339840. Its totient is φ = 27378960.

The previous prime is 66166223. The next prime is 66166229. The reversal of 66166226 is 62266166.

It is an interprime number because it is at equal distance from previous prime (66166223) and next prime (66166229).

It is not an unprimeable number, because it can be changed into a prime (66166223) 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, 81080 + ... + 81891.

It is an arithmetic number, because the mean of its divisors is an integer number (7333740).

Almost surely, 2^66166226 is an apocalyptic number.

66166226 is a deficient number, since it is larger than the sum of its proper divisors (51173614).

66166226 is a wasteful number, since it uses less digits than its factorization.

66166226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163009.

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

The square root of 66166226 is about 8134.2624742505. The cubic root of 66166226 is about 404.4629899373.

The spelling of 66166226 in words is "sixty-six million, one hundred sixty-six thousand, two hundred twenty-six".