1664162790 has 32 divisors (see below), whose sum is σ = 3998557440. Its totient is φ = 443269344.

The previous prime is 1664162789. The next prime is 1664162803. The reversal of 1664162790 is 972614661.

1664162790 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4660 + ... + 57879.

It is an arithmetic number, because the mean of its divisors is an integer number (124954920).

Almost surely, 2^1664162790 is an apocalyptic number.

1664162790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1664162790 is an abundant number, since it is smaller than the sum of its proper divisors (2334394650).

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

1664162790 is a wasteful number, since it uses less digits than its factorization.

1664162790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63436.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 1664162790 is about 40794.1514190454. The cubic root of 1664162790 is about 1185.0370691105.

The spelling of 1664162790 in words is "one billion, six hundred sixty-four million, one hundred sixty-two thousand, seven hundred ninety".