164066265 has 24 divisors (see below), whose sum is σ = 310235328. Its totient is φ = 79547040.

The previous prime is 164066263. The next prime is 164066321. The reversal of 164066265 is 562660461.

It is a happy number.

164066265 is a `hidden beast` number, since 1 + 640 + 6 + 6 + 2 + 6 + 5 = 666.

It is not a de Polignac number, because 164066265 - 2¹ = 164066263 is a prime.

It is a super-2 number, since 2×164066265² = 53835478622100450, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164066261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165229 + ... + 166218.

It is an arithmetic number, because the mean of its divisors is an integer number (12926472).

Almost surely, 2^164066265 is an apocalyptic number.

164066265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164066265 is a deficient number, since it is larger than the sum of its proper divisors (146169063).

164066265 is a wasteful number, since it uses less digits than its factorization.

164066265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331469 (or 331466 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 164066265 is about 12808.8354271573. The cubic root of 164066265 is about 547.4440801084. Note that the first 3 decimals are identical.

The spelling of 164066265 in words is "one hundred sixty-four million, sixty-six thousand, two hundred sixty-five".