667406807334 has 20 divisors (see below), whose sum is σ = 1495485624204. Its totient is φ = 222468935724.

The previous prime is 667406807321. The next prime is 667406807357. The reversal of 667406807334 is 433708604766.

It is a happy number.

667406807334 is a `hidden beast` number, since 6 + 67 + 406 + 80 + 73 + 34 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2059897392 + ... + 2059897715.

Almost surely, 2^667406807334 is an apocalyptic number.

667406807334 is an abundant number, since it is smaller than the sum of its proper divisors (828078816870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667406807334 is a wasteful number, since it uses less digits than its factorization.

667406807334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4119795121 (or 4119795112 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 54.

The spelling of 667406807334 in words is "six hundred sixty-seven billion, four hundred six million, eight hundred seven thousand, three hundred thirty-four".