666067760666 has 32 divisors (see below), whose sum is σ = 1245741890688. Its totient is φ = 259484279040.

The previous prime is 666067760663. The next prime is 666067760671.

It is a happy number.

666067760666 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 666067760599 and 666067760608.

It is not an unprimeable number, because it can be changed into a prime (666067760663) 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, 1639526 + ... + 2005038.

It is an arithmetic number, because the mean of its divisors is an integer number (38929434084).

Almost surely, 2^666067760666 is an apocalyptic number.

666067760666 is a deficient number, since it is larger than the sum of its proper divisors (579674130022).

666067760666 is a wasteful number, since it uses less digits than its factorization.

666067760666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377366.

The product of its (nonzero) digits is 82301184, while the sum is 62.

The spelling of 666067760666 in words is "six hundred sixty-six billion, sixty-seven million, seven hundred sixty thousand, six hundred sixty-six".