247666067 has 6 divisors (see below), whose sum is σ = 272228124. Its totient is φ = 225150860.

The previous prime is 247666057. The next prime is 247666079. The reversal of 247666067 is 760666742.

It is a happy number.

247666067 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 247666067 - 2⁴ = 247666051 is a prime.

It is a super-2 number, since 2×247666067² = 122676961486496978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247666057) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1023293 + ... + 1023534.

It is an arithmetic number, because the mean of its divisors is an integer number (45371354).

Almost surely, 2^247666067 is an apocalyptic number.

247666067 is a deficient number, since it is larger than the sum of its proper divisors (24562057).

247666067 is a wasteful number, since it uses less digits than its factorization.

247666067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2046849 (or 2046838 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 44.

The square root of 247666067 is about 15737.4097932284. The cubic root of 247666067 is about 627.9940117013.

The spelling of 247666067 in words is "two hundred forty-seven million, six hundred sixty-six thousand, sixty-seven".