66001156 has 12 divisors (see below), whose sum is σ = 124386892. Its totient is φ = 30462048.

The previous prime is 66001151. The next prime is 66001163. The reversal of 66001156 is 65110066.

66001156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4064256 + 61936900 = 2016^2 + 7870^2 .

It is a super-3 number, since 3×66001156³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66001156.

It is not an unprimeable number, because it can be changed into a prime (66001151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 634575 + ... + 634678.

Almost surely, 2^66001156 is an apocalyptic number.

It is an amenable number.

66001156 is a deficient number, since it is larger than the sum of its proper divisors (58385736).

66001156 is a wasteful number, since it uses less digits than its factorization.

66001156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269270 (or 1269268 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 66001156 is about 8124.1095512062. The cubic root of 66001156 is about 404.1263614795.

The spelling of 66001156 in words is "sixty-six million, one thousand, one hundred fifty-six".