66307775667 has 16 divisors (see below), whose sum is σ = 104524573440. Its totient is φ = 36583600032.

The previous prime is 66307775659. The next prime is 66307775693. The reversal of 66307775667 is 76657770366.

It is not a de Polignac number, because 66307775667 - 2³ = 66307775659 is a prime.

It is a super-2 number, since 2×66307775667² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66307775667.

It is not an unprimeable number, because it can be changed into a prime (66307775617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54439273 + ... + 54440490.

It is an arithmetic number, because the mean of its divisors is an integer number (6532785840).

Almost surely, 2^66307775667 is an apocalyptic number.

66307775667 is a deficient number, since it is larger than the sum of its proper divisors (38216797773).

66307775667 is a wasteful number, since it uses less digits than its factorization.

66307775667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108879802.

The product of its (nonzero) digits is 46675440, while the sum is 60.

The spelling of 66307775667 in words is "sixty-six billion, three hundred seven million, seven hundred seventy-five thousand, six hundred sixty-seven".