667406666734 has 16 divisors (see below), whose sum is σ = 1035434183040. Its totient is φ = 322304237280.

The previous prime is 667406666683. The next prime is 667406666737. The reversal of 667406666734 is 437666604766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667406666737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10542729 + ... + 10605844.

It is an arithmetic number, because the mean of its divisors is an integer number (64714636440).

Almost surely, 2^667406666734 is an apocalyptic number.

667406666734 is a deficient number, since it is larger than the sum of its proper divisors (368027516306).

667406666734 is a wasteful number, since it uses less digits than its factorization.

667406666734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21149115.

The product of its (nonzero) digits is 109734912, while the sum is 61.

The spelling of 667406666734 in words is "six hundred sixty-seven billion, four hundred six million, six hundred sixty-six thousand, seven hundred thirty-four".