667428486664 has 32 divisors (see below), whose sum is σ = 1265469337440. Its totient is φ = 329988131200.

The previous prime is 667428486649. The next prime is 667428486707. The reversal of 667428486664 is 466684824766.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 667428486664.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 838714 + ... + 1427689.

It is an arithmetic number, because the mean of its divisors is an integer number (39545916795).

Almost surely, 2^667428486664 is an apocalyptic number.

It is an amenable number.

667428486664 is a deficient number, since it is larger than the sum of its proper divisors (598040850776).

667428486664 is a wasteful number, since it uses less digits than its factorization.

667428486664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2266821 (or 2266817 counting only the distinct ones).

The product of its digits is 445906944, while the sum is 67.

The spelling of 667428486664 in words is "six hundred sixty-seven billion, four hundred twenty-eight million, four hundred eighty-six thousand, six hundred sixty-four".