667670726726 has 16 divisors (see below), whose sum is σ = 1010655521568. Its totient is φ = 330787228800.

The previous prime is 667670726719. The next prime is 667670726741. The reversal of 667670726726 is 627627076766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383111 + ... + 1217421.

It is an arithmetic number, because the mean of its divisors is an integer number (63165970098).

Almost surely, 2^667670726726 is an apocalyptic number.

667670726726 is a deficient number, since it is larger than the sum of its proper divisors (342984794842).

667670726726 is a wasteful number, since it uses less digits than its factorization.

667670726726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837967.

The product of its (nonzero) digits is 74680704, while the sum is 62.

The spelling of 667670726726 in words is "six hundred sixty-seven billion, six hundred seventy million, seven hundred twenty-six thousand, seven hundred twenty-six".