766668866667 has 16 divisors (see below), whose sum is σ = 1117054495872. Its totient is φ = 463856222720.

The previous prime is 766668866657. The next prime is 766668866669.

766668866667 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 766668866667 - 2¹² = 766668862571 is a prime.

It is a super-2 number, since 2×766668866667² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 766668866592 and 766668866601.

It is not an unprimeable number, because it can be changed into a prime (766668866669) 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, 19769718 + ... + 19808459.

It is an arithmetic number, because the mean of its divisors is an integer number (69815905992).

Almost surely, 2^766668866667 is an apocalyptic number.

766668866667 is a deficient number, since it is larger than the sum of its proper divisors (350385629205).

766668866667 is a wasteful number, since it uses less digits than its factorization.

766668866667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39578778.

The product of its digits is 5267275776, while the sum is 78.

The spelling of 766668866667 in words is "seven hundred sixty-six billion, six hundred sixty-eight million, eight hundred sixty-six thousand, six hundred sixty-seven".