1664082555 has 8 divisors (see below), whose sum is σ = 2662532112. Its totient is φ = 887510688.

The previous prime is 1664082547. The next prime is 1664082571. The reversal of 1664082555 is 5552804661.

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

It is not a de Polignac number, because 1664082555 - 2³ = 1664082547 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 55469404 + ... + 55469433.

It is an arithmetic number, because the mean of its divisors is an integer number (332816514).

Almost surely, 2^1664082555 is an apocalyptic number.

1664082555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1664082555 is a deficient number, since it is larger than the sum of its proper divisors (998449557).

1664082555 is a wasteful number, since it uses less digits than its factorization.

1664082555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110938845.

The product of its (nonzero) digits is 288000, while the sum is 42.

The square root of 1664082555 is about 40793.1679941629. The cubic root of 1664082555 is about 1185.0180239029.

The spelling of 1664082555 in words is "one billion, six hundred sixty-four million, eighty-two thousand, five hundred fifty-five".