66222585 has 96 divisors (see below), whose sum is σ = 138692736. Its totient is φ = 28800000.

The previous prime is 66222571. The next prime is 66222601. The reversal of 66222585 is 58522266.

66222585 is a `hidden beast` number, since 6 + 622 + 25 + 8 + 5 = 666.

It is not a de Polignac number, because 66222585 - 2⁸ = 66222329 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 263710 + ... + 263960.

It is an arithmetic number, because the mean of its divisors is an integer number (1444716).

Almost surely, 2^66222585 is an apocalyptic number.

66222585 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66222585 is an abundant number, since it is smaller than the sum of its proper divisors (72470151).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66222585 is a wasteful number, since it uses less digits than its factorization.

66222585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327 (or 324 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 66222585 is about 8137.7260337271. The cubic root of 66222585 is about 404.5777950373.

The spelling of 66222585 in words is "sixty-six million, two hundred twenty-two thousand, five hundred eighty-five".