1664195072 has 40 divisors (see below), whose sum is σ = 3432435072. Its totient is φ = 805248000.

The previous prime is 1664195053. The next prime is 1664195083. The reversal of 1664195072 is 2705914661.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36554 + ... + 68297.

Almost surely, 2^1664195072 is an apocalyptic number.

It is an amenable number.

1664195072 is an abundant number, since it is smaller than the sum of its proper divisors (1768240000).

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

1664195072 is an equidigital number, since it uses as much as digits as its factorization.

1664195072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104900 (or 104884 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 1664195072 is about 40794.5470865899. The cubic root of 1664195072 is about 1185.0447316460.

The spelling of 1664195072 in words is "one billion, six hundred sixty-four million, one hundred ninety-five thousand, seventy-two".