261667676 has 6 divisors (see below), whose sum is σ = 457918440. Its totient is φ = 130833836.

The previous prime is 261667673. The next prime is 261667717. The reversal of 261667676 is 676766162.

It is a self number, because there is not a number n which added to its sum of digits gives 261667676.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261667673) by changing a digit.

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 as a sum of consecutive naturals, namely, 32708456 + ... + 32708463.

It is an arithmetic number, because the mean of its divisors is an integer number (76319740).

Almost surely, 2^261667676 is an apocalyptic number.

It is an amenable number.

261667676 is a deficient number, since it is larger than the sum of its proper divisors (196250764).

261667676 is a wasteful number, since it uses less digits than its factorization.

261667676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65416923 (or 65416921 counting only the distinct ones).

The product of its digits is 762048, while the sum is 47.

The square root of 261667676 is about 16176.1452763011. The cubic root of 261667676 is about 639.6121315184.

The spelling of 261667676 in words is "two hundred sixty-one million, six hundred sixty-seven thousand, six hundred seventy-six".