1664052654 has 64 divisors (see below), whose sum is σ = 3794999040. Its totient is φ = 481797120.

The previous prime is 1664052619. The next prime is 1664052671. The reversal of 1664052654 is 4562504661.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181177 + ... + 190139.

It is an arithmetic number, because the mean of its divisors is an integer number (59296860).

Almost surely, 2^1664052654 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1664052654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1897499520).

1664052654 is an abundant number, since it is smaller than the sum of its proper divisors (2130946386).

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

1664052654 is a wasteful number, since it uses less digits than its factorization.

1664052654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9105.

The product of its (nonzero) digits is 172800, while the sum is 39.

The square root of 1664052654 is about 40792.8014973230. The cubic root of 1664052654 is about 1185.0109262109.

The spelling of 1664052654 in words is "one billion, six hundred sixty-four million, fifty-two thousand, six hundred fifty-four".