1663149816 has 48 divisors (see below), whose sum is σ = 4509671400. Its totient is φ = 553730112.

The previous prime is 1663149809. The next prime is 1663149821. The reversal of 1663149816 is 6189413661.

1663149816 is a `hidden beast` number, since 1 + 6 + 631 + 4 + 9 + 8 + 1 + 6 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49975 + ... + 76313.

Almost surely, 2^1663149816 is an apocalyptic number.

It is an amenable number.

1663149816 is an abundant number, since it is smaller than the sum of its proper divisors (2846521584).

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

1663149816 is a wasteful number, since it uses less digits than its factorization.

1663149816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27228 (or 27221 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 1663149816 is about 40781.7338523021. The cubic root of 1663149816 is about 1184.7965767354.

The spelling of 1663149816 in words is "one billion, six hundred sixty-three million, one hundred forty-nine thousand, eight hundred sixteen".