66686275733 has 16 divisors (see below), whose sum is σ = 84075511680. Its totient is φ = 51379468800.

The previous prime is 66686275727. The next prime is 66686275759. The reversal of 66686275733 is 33757268666.

It is not a de Polignac number, because 66686275733 - 2²⁶ = 66619166869 is a prime.

It is a super-2 number, since 2×66686275733² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66686275633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4858628 + ... + 4872333.

It is an arithmetic number, because the mean of its divisors is an integer number (5254719480).

Almost surely, 2^66686275733 is an apocalyptic number.

It is an amenable number.

66686275733 is a deficient number, since it is larger than the sum of its proper divisors (17389235947).

66686275733 is a wasteful number, since it uses less digits than its factorization.

66686275733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9731068.

The product of its digits is 45722880, while the sum is 59.

The spelling of 66686275733 in words is "sixty-six billion, six hundred eighty-six million, two hundred seventy-five thousand, seven hundred thirty-three".