667256652766 has 8 divisors (see below), whose sum is σ = 1091874522744. Its totient is φ = 303298478520.

The previous prime is 667256652761. The next prime is 667256652827.

667256652766 is nontrivially palindromic in base 10.

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

It is a junction number, because it is equal to n+sod(n) for n = 667256652698 and 667256652707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667256652761) 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, 15164923905 + ... + 15164923948.

It is an arithmetic number, because the mean of its divisors is an integer number (136484315343).

Almost surely, 2^667256652766 is an apocalyptic number.

667256652766 is a deficient number, since it is larger than the sum of its proper divisors (424617869978).

667256652766 is a wasteful number, since it uses less digits than its factorization.

667256652766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30329847866.

The product of its digits is 228614400, while the sum is 64.

The spelling of 667256652766 in words is "six hundred sixty-seven billion, two hundred fifty-six million, six hundred fifty-two thousand, seven hundred sixty-six".