66606653289 has 96 divisors (see below), whose sum is σ = 107828654080. Its totient is φ = 36395568000.

The previous prime is 66606653273. The next prime is 66606653297. The reversal of 66606653289 is 98235660666.

66606653289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66606653289 - 2⁴ = 66606653273 is a prime.

It is a super-2 number, since 2×66606653289² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (66606653209) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13039674 + ... + 13044780.

Almost surely, 2^66606653289 is an apocalyptic number.

It is an amenable number.

66606653289 is a deficient number, since it is larger than the sum of its proper divisors (41222000791).

66606653289 is a wasteful number, since it uses less digits than its factorization.

66606653289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5243 (or 5232 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 57.

The spelling of 66606653289 in words is "sixty-six billion, six hundred six million, six hundred fifty-three thousand, two hundred eighty-nine".