1663882655 has 8 divisors (see below), whose sum is σ = 2003081184. Its totient is φ = 1326824800.

The previous prime is 1663882631. The next prime is 1663882699. The reversal of 1663882655 is 5562883661.

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

It is not a de Polignac number, because 1663882655 - 2¹⁶ = 1663817119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 533456 + ... + 536565.

It is an arithmetic number, because the mean of its divisors is an integer number (250385148).

Almost surely, 2^1663882655 is an apocalyptic number.

1663882655 is a deficient number, since it is larger than the sum of its proper divisors (339198529).

1663882655 is a wasteful number, since it uses less digits than its factorization.

1663882655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070337.

The product of its digits is 2073600, while the sum is 50.

The square root of 1663882655 is about 40790.7177553914. The cubic root of 1663882655 is about 1184.9705714116.

The spelling of 1663882655 in words is "one billion, six hundred sixty-three million, eight hundred eighty-two thousand, six hundred fifty-five".