261370667 has 4 divisors (see below), whose sum is σ = 265052016. Its totient is φ = 257689320.

The previous prime is 261370657. The next prime is 261370673. The reversal of 261370667 is 766073162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261370667 - 2⁴ = 261370651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261370667.

It is not an unprimeable number, because it can be changed into a prime (261370607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1840568 + ... + 1840709.

It is an arithmetic number, because the mean of its divisors is an integer number (66263004).

Almost surely, 2^261370667 is an apocalyptic number.

261370667 is a deficient number, since it is larger than the sum of its proper divisors (3681349).

261370667 is an equidigital number, since it uses as much as digits as its factorization.

261370667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3681348.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 261370667 is about 16166.9622069206. The cubic root of 261370667 is about 639.3700401197.

The spelling of 261370667 in words is "two hundred sixty-one million, three hundred seventy thousand, six hundred sixty-seven".