1663676996 has 12 divisors (see below), whose sum is σ = 2966367852. Its totient is φ = 816143328.

The previous prime is 1663676953. The next prime is 1663677007. The reversal of 1663676996 is 6996763661.

It can be written as a sum of positive squares in 2 ways, for example, as 981944896 + 681732100 = 31336^2 + 26110^2 .

It is a super-2 number, since 2×1663676996² = 5535642294039168032, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3923555 + ... + 3923978.

It is an arithmetic number, because the mean of its divisors is an integer number (247197321).

Almost surely, 2^1663676996 is an apocalyptic number.

It is an amenable number.

1663676996 is a deficient number, since it is larger than the sum of its proper divisors (1302690856).

1663676996 is a wasteful number, since it uses less digits than its factorization.

1663676996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7847590 (or 7847588 counting only the distinct ones).

The product of its digits is 13226976, while the sum is 59.

The square root of 1663676996 is about 40788.1967730862. The cubic root of 1663676996 is about 1184.9217478756.

The spelling of 1663676996 in words is "one billion, six hundred sixty-three million, six hundred seventy-six thousand, nine hundred ninety-six".