1664410782 has 8 divisors (see below), whose sum is σ = 3328821576. Its totient is φ = 554803592.

The previous prime is 1664410771. The next prime is 1664410793. The reversal of 1664410782 is 2870144661.

1664410782 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1664410771) and next prime (1664410793).

It is a sphenic number, since it is the product of 3 distinct primes.

1664410782 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1664410782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138700893 + ... + 138700904.

It is an arithmetic number, because the mean of its divisors is an integer number (416102697).

Almost surely, 2^1664410782 is an apocalyptic number.

1664410782 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1664410782 is a wasteful number, since it uses less digits than its factorization.

1664410782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277401802.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 1664410782 is about 40797.1908591756. The cubic root of 1664410782 is about 1185.0959305628.

The spelling of 1664410782 in words is "one billion, six hundred sixty-four million, four hundred ten thousand, seven hundred eighty-two".