667540006734 has 8 divisors (see below), whose sum is σ = 1335080013480. Its totient is φ = 222513335576.

The previous prime is 667540006733. The next prime is 667540006747. The reversal of 667540006734 is 437600045766.

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

667540006734 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667540006733) 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, 55628333889 + ... + 55628333900.

It is an arithmetic number, because the mean of its divisors is an integer number (166885001685).

Almost surely, 2^667540006734 is an apocalyptic number.

667540006734 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

667540006734 is a wasteful number, since it uses less digits than its factorization.

667540006734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111256667794.

The product of its (nonzero) digits is 2540160, while the sum is 48.

The spelling of 667540006734 in words is "six hundred sixty-seven billion, five hundred forty million, six thousand, seven hundred thirty-four".