247666996 has 12 divisors (see below), whose sum is σ = 437886148. Its totient is φ = 122556672.

The previous prime is 247666963. The next prime is 247666997. The reversal of 247666996 is 699666742.

It can be written as a sum of positive squares in 2 ways, for example, as 75690000 + 171976996 = 8700^2 + 13114^2 .

It is a super-2 number, since 2×247666996² = 122677881815328032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247666997) by changing a digit.

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, 318771 + ... + 319546.

Almost surely, 2^247666996 is an apocalyptic number.

It is an amenable number.

247666996 is a deficient number, since it is larger than the sum of its proper divisors (190219152).

247666996 is a wasteful number, since it uses less digits than its factorization.

247666996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638418 (or 638416 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 55.

The square root of 247666996 is about 15737.4393088584. The cubic root of 247666996 is about 627.9947969061.

The spelling of 247666996 in words is "two hundred forty-seven million, six hundred sixty-six thousand, nine hundred ninety-six".