666673654000 has 40 divisors (see below), whose sum is σ = 1612016900208. Its totient is φ = 266669460800.

The previous prime is 666673653991. The next prime is 666673654019. The reversal of 666673654000 is 456376666.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 166666414 + ... + 166670413.

Almost surely, 2^666673654000 is an apocalyptic number.

It is an amenable number.

666673654000 is an abundant number, since it is smaller than the sum of its proper divisors (945343246208).

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

666673654000 is a wasteful number, since it uses less digits than its factorization.

666673654000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333336850 (or 333336834 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 49.

The spelling of 666673654000 in words is "six hundred sixty-six billion, six hundred seventy-three million, six hundred fifty-four thousand".