247994678466 has 24 divisors (see below), whose sum is σ = 537331393404. Its totient is φ = 82663417440.

The previous prime is 247994678389. The next prime is 247994678467. The reversal of 247994678466 is 664876499742.

247994678466 is a `hidden beast` number, since 2 + 4 + 7 + 9 + 94 + 6 + 78 + 466 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 247983084441 + 11594025 = 497979^2 + 3405^2 .

It is a super-2 number, since 2×247994678466² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247994678394 and 247994678403.

It is not an unprimeable number, because it can be changed into a prime (247994678467) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1474656 + ... + 1634196.

Almost surely, 2^247994678466 is an apocalyptic number.

247994678466 is an abundant number, since it is smaller than the sum of its proper divisors (289336714938).

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

247994678466 is a wasteful number, since it uses less digits than its factorization.

247994678466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245906 (or 245903 counting only the distinct ones).

The product of its digits is 877879296, while the sum is 72.

The spelling of 247994678466 in words is "two hundred forty-seven billion, nine hundred ninety-four million, six hundred seventy-eight thousand, four hundred sixty-six".