1066212225 has 72 divisors (see below), whose sum is σ = 2077158720. Its totient is φ = 519661440.

The previous prime is 1066212223. The next prime is 1066212241. The reversal of 1066212225 is 5222126601.

1066212225 is a `hidden beast` number, since 10 + 6 + 621 + 2 + 2 + 25 = 666.

It is not a de Polignac number, because 1066212225 - 2¹ = 1066212223 is a prime.

It is a super-2 number, since 2×1066212225² = 2273617017478901250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066212223) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 299506 + ... + 303044.

Almost surely, 2^1066212225 is an apocalyptic number.

1066212225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1066212225 is a deficient number, since it is larger than the sum of its proper divisors (1010946495).

1066212225 is a wasteful number, since it uses less digits than its factorization.

1066212225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3671 (or 3663 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1066212225 is about 32652.9053071851. The cubic root of 1066212225 is about 1021.6007880237.

Adding to 1066212225 its reverse (5222126601), we get a palindrome (6288338826).

The spelling of 1066212225 in words is "one billion, sixty-six million, two hundred twelve thousand, two hundred twenty-five".