667996699766 has 8 divisors (see below), whose sum is σ = 1093085508744. Its totient is φ = 303634863520.

The previous prime is 667996699757. The next prime is 667996699771.

It is a happy number.

667996699766 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15181743155 + ... + 15181743198.

It is an arithmetic number, because the mean of its divisors is an integer number (136635688593).

Almost surely, 2^667996699766 is an apocalyptic number.

667996699766 is a deficient number, since it is larger than the sum of its proper divisors (425088808978).

667996699766 is a wasteful number, since it uses less digits than its factorization.

667996699766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30363486366.

The product of its digits is 14999390784, while the sum is 86.

The spelling of 667996699766 in words is "six hundred sixty-seven billion, nine hundred ninety-six million, six hundred ninety-nine thousand, seven hundred sixty-six".