66985027236 has 36 divisors (see below), whose sum is σ = 169331844864. Its totient is φ = 22327210800.

The previous prime is 66985027157. The next prime is 66985027237. The reversal of 66985027236 is 63272058966.

66985027236 is a `hidden beast` number, since 6 + 69 + 8 + 502 + 72 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (66985027237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 978901 + ... + 1045091.

Almost surely, 2^66985027236 is an apocalyptic number.

It is an amenable number.

66985027236 is an abundant number, since it is smaller than the sum of its proper divisors (102346817628).

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

66985027236 is a wasteful number, since it uses less digits than its factorization.

66985027236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94312 (or 94307 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 66985027236 in words is "sixty-six billion, nine hundred eighty-five million, twenty-seven thousand, two hundred thirty-six".