1666964484 has 36 divisors (see below), whose sum is σ = 4229761536. Its totient is φ = 553538928.

The previous prime is 1666964479. The next prime is 1666964521. The reversal of 1666964484 is 4844696661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1666964484.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78564 + ... + 97499.

It is an arithmetic number, because the mean of its divisors is an integer number (117493376).

Almost surely, 2^1666964484 is an apocalyptic number.

It is an amenable number.

1666964484 is an abundant number, since it is smaller than the sum of its proper divisors (2562797052).

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

1666964484 is a wasteful number, since it uses less digits than its factorization.

1666964484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176336 (or 176331 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 54.

The square root of 1666964484 is about 40828.4763859736. The cubic root of 1666964484 is about 1185.7017175893.

The spelling of 1666964484 in words is "one billion, six hundred sixty-six million, nine hundred sixty-four thousand, four hundred eighty-four".