255961667 has 8 divisors (see below), whose sum is σ = 275913456. Its totient is φ = 236047392.

The previous prime is 255961663. The next prime is 255961669. The reversal of 255961667 is 766169552.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255961667 - 2² = 255961663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255961663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5708 + ... + 23334.

It is an arithmetic number, because the mean of its divisors is an integer number (34489182).

Almost surely, 2^255961667 is an apocalyptic number.

255961667 is a deficient number, since it is larger than the sum of its proper divisors (19951789).

255961667 is a wasteful number, since it uses less digits than its factorization.

255961667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18757.

The product of its digits is 680400, while the sum is 47.

The square root of 255961667 is about 15998.8020489035. The cubic root of 255961667 is about 634.9287265779.

The spelling of 255961667 in words is "two hundred fifty-five million, nine hundred sixty-one thousand, six hundred sixty-seven".