1664789452 has 6 divisors (see below), whose sum is σ = 2913381548. Its totient is φ = 832394724.

The previous prime is 1664789449. The next prime is 1664789453. The reversal of 1664789452 is 2549874661.

It is a self number, because there is not a number n which added to its sum of digits gives 1664789452.

It is not an unprimeable number, because it can be changed into a prime (1664789453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208098678 + ... + 208098685.

Almost surely, 2^1664789452 is an apocalyptic number.

It is an amenable number.

1664789452 is a deficient number, since it is larger than the sum of its proper divisors (1248592096).

1664789452 is a wasteful number, since it uses less digits than its factorization.

1664789452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416197367 (or 416197365 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 52.

The square root of 1664789452 is about 40801.8314785011. The cubic root of 1664789452 is about 1185.1857974500.

The spelling of 1664789452 in words is "one billion, six hundred sixty-four million, seven hundred eighty-nine thousand, four hundred fifty-two".