667443348664 has 32 divisors (see below), whose sum is σ = 1278145915200. Its totient is φ = 326605137280.

The previous prime is 667443348661. The next prime is 667443348697. The reversal of 667443348664 is 466843344766.

667443348664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×667443348664³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667443348661) 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, 12057402 + ... + 12112630.

It is an arithmetic number, because the mean of its divisors is an integer number (39942059850).

Almost surely, 2^667443348664 is an apocalyptic number.

It is an amenable number.

667443348664 is a deficient number, since it is larger than the sum of its proper divisors (610702566536).

667443348664 is a wasteful number, since it uses less digits than its factorization.

667443348664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87423 (or 87419 counting only the distinct ones).

The product of its digits is 167215104, while the sum is 61.

The spelling of 667443348664 in words is "six hundred sixty-seven billion, four hundred forty-three million, three hundred forty-eight thousand, six hundred sixty-four".