1663228678 has 8 divisors (see below), whose sum is σ = 2575321920. Its totient is φ = 804788040.

The previous prime is 1663228661. The next prime is 1663228687. The reversal of 1663228678 is 8768223661.

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

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, 13413073 + ... + 13413196.

It is an arithmetic number, because the mean of its divisors is an integer number (321915240).

Almost surely, 2^1663228678 is an apocalyptic number.

1663228678 is a deficient number, since it is larger than the sum of its proper divisors (912093242).

1663228678 is a wasteful number, since it uses less digits than its factorization.

1663228678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26826302.

The product of its digits is 1161216, while the sum is 49.

The square root of 1663228678 is about 40782.7007197905. The cubic root of 1663228678 is about 1184.8153030402.

The spelling of 1663228678 in words is "one billion, six hundred sixty-three million, two hundred twenty-eight thousand, six hundred seventy-eight".