660766121667066 has 16 divisors (see below), whose sum is σ = 1321639310827584. Its totient is φ = 220237529306784.

The previous prime is 660766121667061. The next prime is 660766121667103.

It is a happy number.

660766121667066 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×660766121667066² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 660766121666988 and 660766121667006.

It is not an unprimeable number, because it can be changed into a prime (660766121667061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4461065331 + ... + 4461213446.

It is an arithmetic number, because the mean of its divisors is an integer number (82602456926724).

Almost surely, 2^{660766121667066} is an apocalyptic number.

660766121667066 is an abundant number, since it is smaller than the sum of its proper divisors (660873189160518).

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

660766121667066 is a wasteful number, since it uses less digits than its factorization.

660766121667066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8922291125.

The product of its (nonzero) digits is 164602368, while the sum is 66.

The spelling of 660766121667066 in words is "six hundred sixty trillion, seven hundred sixty-six billion, one hundred twenty-one million, six hundred sixty-seven thousand, sixty-six".