261667006 has 16 divisors (see below), whose sum is σ = 403285680. Its totient is φ = 127284480.

The previous prime is 261666983. The next prime is 261667013. The reversal of 261667006 is 600766162.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16 + ... + 22876.

It is an arithmetic number, because the mean of its divisors is an integer number (25205355).

Almost surely, 2^261667006 is an apocalyptic number.

261667006 is a deficient number, since it is larger than the sum of its proper divisors (141618674).

261667006 is a wasteful number, since it uses less digits than its factorization.

261667006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23019.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 261667006 is about 16176.1245667805. The cubic root of 261667006 is about 639.6115856090.

The spelling of 261667006 in words is "two hundred sixty-one million, six hundred sixty-seven thousand, six".