261206706 has 16 divisors (see below), whose sum is σ = 529027200. Its totient is φ = 85966608.

The previous prime is 261206689. The next prime is 261206719. The reversal of 261206706 is 607602162.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275061 + ... + 276008.

It is an arithmetic number, because the mean of its divisors is an integer number (33064200).

Almost surely, 2^261206706 is an apocalyptic number.

261206706 is an abundant number, since it is smaller than the sum of its proper divisors (267820494).

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

261206706 is a wasteful number, since it uses less digits than its factorization.

261206706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551153.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 261206706 is about 16161.8905453539. The cubic root of 261206706 is about 639.2363172849.

Adding to 261206706 its reverse (607602162), we get a palindrome (868808868).

The spelling of 261206706 in words is "two hundred sixty-one million, two hundred six thousand, seven hundred six".