766726707627667 has 4 divisors (see below), whose sum is σ = 766952947438560. Its totient is φ = 766500467816776.

The previous prime is 766726707627619. The next prime is 766726707627679.

766726707627667 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-766726707627667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (766726707627607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113119900363 + ... + 113119907140.

It is an arithmetic number, because the mean of its divisors is an integer number (191738236859640).

Almost surely, 2^{766726707627667} is an apocalyptic number.

766726707627667 is a deficient number, since it is larger than the sum of its proper divisors (226239810893).

766726707627667 is a wasteful number, since it uses less digits than its factorization.

766726707627667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226239810892.

The product of its (nonzero) digits is 21956126976, while the sum is 82.

The spelling of 766726707627667 in words is "seven hundred sixty-six trillion, seven hundred twenty-six billion, seven hundred seven million, six hundred twenty-seven thousand, six hundred sixty-seven".