1663228677 has 32 divisors (see below), whose sum is σ = 2649905280. Its totient is φ = 915998720.

The previous prime is 1663228661. The next prime is 1663228687. The reversal of 1663228677 is 7768223661.

It is a cyclic number.

It is not a de Polignac number, because 1663228677 - 2⁴ = 1663228661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663228687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34848 + ... + 67385.

It is an arithmetic number, because the mean of its divisors is an integer number (82809540).

Almost surely, 2^1663228677 is an apocalyptic number.

1663228677 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1663228677 is a deficient number, since it is larger than the sum of its proper divisors (986676603).

1663228677 is a wasteful number, since it uses less digits than its factorization.

1663228677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102293.

The product of its digits is 1016064, while the sum is 48.

The square root of 1663228677 is about 40782.7007075304. The cubic root of 1663228677 is about 1184.8153028027.

The spelling of 1663228677 in words is "one billion, six hundred sixty-three million, two hundred twenty-eight thousand, six hundred seventy-seven".