66166353 has 12 divisors (see below), whose sum is σ = 104262288. Its totient is φ = 40100760.

The previous prime is 66166343. The next prime is 66166381. The reversal of 66166353 is 35366166.

It is a happy number.

66166353 is a `hidden beast` number, since 6 + 6 + 16 + 635 + 3 = 666.

It is not a de Polignac number, because 66166353 - 2⁴ = 66166337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66166343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 334075 + ... + 334272.

It is an arithmetic number, because the mean of its divisors is an integer number (8688524).

Almost surely, 2^66166353 is an apocalyptic number.

It is an amenable number.

66166353 is a deficient number, since it is larger than the sum of its proper divisors (38095935).

66166353 is a wasteful number, since it uses less digits than its factorization.

66166353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668364 (or 668361 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 66166353 is about 8134.2702807320. The cubic root of 66166353 is about 404.4632487137.

The spelling of 66166353 in words is "sixty-six million, one hundred sixty-six thousand, three hundred fifty-three".