261879667 has 12 divisors (see below), whose sum is σ = 305558760. Its totient is φ = 223788096.

The previous prime is 261879623. The next prime is 261879721. The reversal of 261879667 is 766978162.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-261879667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261879967) 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, 8584 + ... + 24442.

It is an arithmetic number, because the mean of its divisors is an integer number (25463230).

Almost surely, 2^261879667 is an apocalyptic number.

261879667 is a deficient number, since it is larger than the sum of its proper divisors (43679093).

261879667 is a wasteful number, since it uses less digits than its factorization.

261879667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16210 (or 16203 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 52.

The square root of 261879667 is about 16182.6965305539. The cubic root of 261879667 is about 639.7848129097.

The spelling of 261879667 in words is "two hundred sixty-one million, eight hundred seventy-nine thousand, six hundred sixty-seven".