666656003424 has 24 divisors (see below), whose sum is σ = 1749972009240. Its totient is φ = 222218667776.

The previous prime is 666656003413. The next prime is 666656003437. The reversal of 666656003424 is 424300656666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3472166589 + ... + 3472166780.

It is an arithmetic number, because the mean of its divisors is an integer number (72915500385).

Almost surely, 2^666656003424 is an apocalyptic number.

It is an amenable number.

666656003424 is an abundant number, since it is smaller than the sum of its proper divisors (1083316005816).

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

666656003424 is a wasteful number, since it uses less digits than its factorization.

666656003424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6944333382 (or 6944333374 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 48.

The spelling of 666656003424 in words is "six hundred sixty-six billion, six hundred fifty-six million, three thousand, four hundred twenty-four".